I have a challenge that I am doing which is also my mini goal. The challenge is too lose 12 lbs by Valentines Day but I'm not sure what exactly should I be doing. I got to the gym when I get out of class ; 35mins on elliptical, 30mins on the bike, 20mins on the treadmill (more walking than running) and some workouts on my biceps and abs!
I eat a banana and yogurt for breakfast, 6inch subway sandwich (wheat bread with turkey and provolone cheese, lettuce n tomatoes and little vingar) for lunch, dinner is baked chicken, greens, brown rice or mashed potatoes, and I drink water all day!
I know its possible to lose 2+ lbs per week but I'm not sure if I'm going in the correct direction. I cannot afford a personal trainer!
Can anyone please give me tips on exercises to do at the gym and also at home, what kinds of food to eat and snacks??
I want to lose 50 lbs -- you're help is greatly appreciated! (Private message are welcomed)

Sounds like your diet is pretty good. I would suggest getting in more protien at breakfast though. On the exercise you're good too. I use a program called "lose it". I have the app on my iPhone and you can also access it online if you don't have a smartphone. You put in your weight, height, etc and it tells you how many calories you should take in per day to lose 2 lbs a week. You also can put in what you eat and what excercise you do to make sure you're on track each day. I would suggest checking it out.
But if I did it routinely, this is definitely what I would do. Also, skip the mashed potatoes except as a treat now and then. Try substituting mashed squash or sweet potatoes.