First day without meat. (Go me!) Am I doing it right?

Make sure you try to encorporate nuts into your diet aswell.

Heaps of mushroom, because of it's b12 levels is good also. They're a vegetarians meat.

Other than that it was pretty good. Try not to overdo it wiith the breads, and eat heaps of salads and stirfrys wtc. don't eat too much cheese... it's really unhealthy for you.

Generally that would be OK, however I would say you need to eat more green vegetables.

All that boring lettuce, brocolli, spinach and stuff.
Calcium, iron, anti-oxidents, etc.

I would suggest that you also get a general vitamin & mineral  supplement to be safe (and check it has 100% of your B12 recommended intake. Even though you aren't vegan, it's a good idea), and look into flax seed oil. This is a yucky oil that you get from the health food shop. A  single spoon a day on your salad, or drunk neat), will ensure your omega 3 fatty acids are taken care of. Never cook with it, keep it in the fridge and try to have a little every day. But don't think it's a critical you need to rush out and get some, there's no need to rush to the health shop today.

Congratulations.

Generally, I disagree with this. It is not only possible, but easy, to be a very healthy vegetarian or vegan without the use of supplements, it just takes a little bit of research and planning.  Even though you are not going vegan, I suggest getting a copy of something like 'Becoming Vegan' by Brenda Davis, Vesanto Melina (you can even Google Books Preview, URL at the bottom) to give you a rundown of what you need and where you can get it.  I have found that books aimed at vegans, rather than vegetarians, are generally better with the nutrition stuff, but others may have a good recommendation of a veggie book for you.
I also suggest going to see your doctor and getting a blood test to work out if you are actually deficient in anything.  I can be just as harmful to 'overdose' on vitamins and minerals as to be deficient, so you don't really want to be pumping things into your body that you don't need.

Apart from that - well done, good luck, start stalking vegetarian and vegan food blogs for inspiration.

ETA: I just wanted to add that I think it's better for *anyone* to not use supplements, not just veg*ns.  I think they are very much overused, and generally because people are too lazy (though, not saying anyone here is) to figure out what their body actually needs.  Plus, there is the added bonus of being able to say 'no' when people smugly insist that you must take supplements because you can't get everything you need without meat.
ALSO, I want to point out that I'm not saying - in any way shape or form - 'Don't eat fortified foods.'  I drink ricemilk with added calcium - but I factor it in to what I need.  I'm saying, I think it should be done with FOODS not PILLS.

Becoming Vegan:  http://books.google.com.au/books?id=R7FRvTyRF0cC&printsec=frontcover&dq=Becoming+Vegan&source=bl&ots=6jJPvX3Bsn&sig=aWz4HrcAT4IBPLisE6BOLtHy_K4&hl=en&ei=TbSiS77yNNCgkQWCjNjaCA&sa=X&oi=book_result&ct=result&resnum=2&ved=0CBMQ6AEwAQ#v=onepage&q=&f=false

Ejay, I meet members of the public almost weekly who say they gave up vegetarianism because they got sick. While it's all very commendable to recommend getting nutrients from food and not pills, with thousands of people dropping out of vegetarianism  because they get sick, we should be making good health easier for new vegetarians, not harder.

Jessum, please take your muti-vitamins & minerals, and look after yourself.
And have a look at www.veganhealth.org
They work with beyondveg.com (an anti-vegetarian website) to report unbiassed nutritional information about vegetarian diets.

I got very sickly as a vegetarian teenager, and most teenagers have enough on their plate without worrying about getting enough brocolli & lettuce.

Generally if you follow the 2&5 rule (2 fruit, 5 veg) you should be fine. Also add some nuts and whole grains (like whole grain bread or pasta) and some soy.

p.s. try not to eat too much cheese - i made that mistake when i first when vegetarian, bad idea, haha

It's great that you're cool with soy milk!

see...
I'm not saying that it's easy to begin with.  I'm saying it's doable, and, I think, preferable.  

And, might I suggest that the majority of people who give up vegetarianism because they get sick haven't taken the time research or plan?!?

Well done Jess!

Definately up your veggie/fruit intake esp greens.

And consider "mock" meats which are easily available from supermarkets or online Cruelty Free Shop, Vegan Perfection, Lamyong etc. If mock meats don't interest you, there's tofu, tempeh, tvp etc.

As Roy said, Omega is important for brain/skin. I've tried the oil but didn't like it, so I take a capsule. I also take a B12 tablet.

A blood test is a good idea. Usually it's best to wait 6 weeks after changing your diet to be effective.

Buy a veg cookbook which will give you ideas for meals. And just experiment! They usually have a section on nutrients. My fav is "Recipes for Health & Happiness by Amanda Quinn.

Keep up the good work!  

Ejay, yes that's the case. They haven't bothered to do the work.
Now, if going vegetarian wasn't so critical to animal lives I wouldn't be so bothered about people not working. For example if the only consequence was them getting sick I'd just say "ok, be lazy and get sick". But with 5000 animal lives relying on every 20 year old's conversaion through unleashed, I believe we have a duty not to rely on people putting in the work, and learning good nutrition.

Sure I know there are problems with vitamin pills but I look at my own teenage years, and realise that my diet of potatoes and cheese through my critical teenage years probably did myself a lot of damage. Some vitamin pills would have been a good idea, because I was too lazy to eat fruit and vegetables.

Roy, of course, I understand where you're coming from.  I'm not saying that anyone HAS TO get rid of their pills - I just think it's irresponsible to advise people to start chugging down multi-vitamins.  Especially because we know how dangerous they can actually be!  

Personally, I think that, given the opportunity everyone has the ability to do it 'foods not pills'.  That's why I linked to  Becoming Vegan.  And, that's why I'm so highly disturbed by this comment:
I believe - as an academic, an educator, and as a vegan - that ALL people have the ability to 'do it right' and to put in the work - but young vegans and vegetarians will NEVER do that unless someone lets them know that they can.

So, now Jessum can choose what she wants to do, but she would never be able to make that choice if the only information she gets is 'start popping vitamin pills.'  It's not the only way, and it's not the best way.