Pastebin.com is one of those sites that is just plain useful.
I originally came across it on IRC as it was a handy tool for people wanting to share snippets of code ie. hardcore geek stuff, however it’s also incredibly useful if you just want to share some text. It doesn’t matter what kind of text – you just copy and paste – problem solved!
Of course a pastebin per se isn’t exactly an original idea – you’ll find loads of sites offering the same functionalilty, but I always end up on pastebin.com since it’s so easy to remember the domain name.