There are tons of different kinds of friends (or so we hear): best friends forever, best friends for now, friends with benefits, old school chums, drinking buddies, frenemies, mistrusted confidants, tolerable coworkers, recovering alcoholics you keep around because they don't mind being the designated driver—you name it. From time to time it's important to touch base with these people in order to let them know you still exist and consider their friendship important enough to take advantage of for a ride to the airport or to help move your couch. Here are 15 of the best ways to half-heartedly express your friendship in whatever form it takes. Feel free to share them on Twitter or Facebook or maybe even send some to your real friends!
For friends you'd like to sleep with, see the 30 most creative ways to let someone know you'd like to have sex with them >>