What is the best way to prepare, health wise, before a big test such as the SAT, LSAT, MCAT? What foods do you recommend to keep my "brain moving?"

I think I may have some kind of urinary tract infection. It came on very suddenly, about three nights ago. And when I pee, there is a burning sensation when my bladder has almost emptied. It's not an STD because I'm in a monogamous relationship, and yes, I'm sure! Please help. Thank you.

1) You know when you get a cold and you have to blow your nose a lot and it gets all sore from rubbing it over and over again with a Kleenex? Do you know of any kind of cream or something that you can put on your nose to help soothe the soreness caused by frequent nose blowing? Any suggestions would be greatly appreciated.

2) I am a 16 year old girl who isn't very good at blowing her nose. I can blow the air down hard enough, but nobody has ever taught me a good technique for a proper clear-out. What is the best way to hold your nose in the tissue to get a really good nose-blow? How would you recommend I try to blow my nose?

What natural food or herb can help soothe stomach ulcers?

I just found out that a friend requires a kidney transplant. I've heard that we are all equipped with two kidneys and can live with just one. How do I find out if I can donate a kidney? What's involved in a kidney donation? Thanks!