This store has a huge selection of cards for every occasion. They have cards that are genuinely funny, and also the sentimental Hallmark cards. I'm personally a fan of writing my own messages, and they have a nice selection of blank cards for that purpose, too.
G. Thanks isn't just limited to cards, though; they have posters (great for when you're moving into your dorm room), a million candles in an assortment of scents, stuffed animals, gel pens, and puzzles that vary by number of pieces. There's a lot of cute things here that would make good gifts or stocking stuffers for family or friends.