Volunteer at a local charity, you can read to children and other fun activities. I personally like to volunteer for larger projects. I like working with others and I sometimes gain a new friend.
Talk to people
It works for me! ^.^
Hey dude. You got steam? Grab a game. I'd recommend Banner Saga. Games are good for your brain.
Read a good book
How about animations?
Help somebody... doing something...!
First time alone?!
No friends, relatives etc...
Put on a good movie, relax and treat yourself like a queen!