What do you do about homesickness?

Don’t worry, it’s not that big of a deal, but I just recently started college and now all of a sudden I’m feeling homesick. I wasn’t at first and I wasn’t expecting to, but I am now. My parents came by to bring me a few things and I didn’t want to leave them and I had to keep myself from crying. I even miss my sister and my brother.

So I’m just wondering: what instances have caused you to be homesick? How long did it last and what did you do about it?