I like browns as my "main" thing to wear all the time as well, my suggestion is to look on google or a similar search engine and type in something like "eye shadows for blue eyes" or "eye shadow for hazel eyes" and you might find colors that compliment your eyecolor.

The weight question.... Um I have yet to find the right answer for that myself, Um, I guess "motivation" is the biggest key to that actually.

And lastly, your yellow teeth (i have them too)... I hate brushing my teeth (but luckily i have healthy teeth regardless), just discolored. The quickest way to get your teeth white is to brush twice a day with a white vinigar/baking soda/hydrogen peroxide mix. You just take the 3 ingredients (or even baking soda/peroxide only) and mix them together to make a paste, and brush your teeth with it. Yes it tastes NASTY (but for me, it takes better than mint, thats the toothpaste i hate), but it really does work, but the important thing is to actually do it, and not get lazy. Also another tip is, if you cannot brush after a meal, rinse really well with plain old WATER. Brush before bed, so you get all that crap off of your teeth, (sugar, etc).

Now I just need to follow my own advice!