Hey, I'm 19 and in college too.
I've got a high metabolism and my weight
is watched pretty closely because I'm in a
sport and I'm a stick. So this is what I
do to keep weight on during season.
Eat three main meals a day. Breakfast is
really important and I eat a huge pile of
eggs and sausage or bacon every morning.
For the other two meals, I'm on meal plan
so I pretty much just shovel in whatever
food is being offered
Just as long as you eat a decent sized
meal you're fine. I always have soup with
whatever I eat and a banana afterwards.
Drink lots of healthy liquids-- water,
gatorade, orange juice(or any juice), milk
(I drink soy milk)-- with your meals and
throughout your day! Smoothies are really
good too if you are up to a little extra
spending-- I get two a week with a protein
booster.
Between meals, I snack... a lot. Granola
bars, sport bars, trial mix, a sandwhich,
crackers with something spread on them--
it's all pretty good. Just as long as
you're taking in healthy calories.
Try getting lean cut red meats, beans, non
water fruits, starchy vegetables, and
heavy breads(spread something yummy on the
bread too-- anything to add on the
calories!) I also take daily vitamins--
haha just in case I get lazy with my diet
somewhere.
Remember to exercise when you do this!
That way you can gain some muscle too!
And make sure you don't gain more than a
pound and a half each week either-- if you
do, cut back just a little bit so you're
back on track with healthy weight gain.