1. Urban Dictionary
http://www.urbandictionary.com/
This is one of my favourite sites for losing a quarter of an hour. You couldnt exactly call it self-improvement like Jonathan Greens Dictionary of Slang, it takes you by the hand and leads you through the darker back streets of the English language.
2. Wordcounter
http://www.wordcounter.com/
I like sites that have a little box on them where you can enter your own text and get some dodgy readout back. (See below.) This one is interesting for catching yourself out, finding what your verbal tics are. Try it with a short story. Or your diary.
3. The Gender Genie
http://bookblog.net/gender/genie.php
See if you can trick it with some Hemingway or Angela Carter. Go on.
4. Fantasy Name Generator
http://www.rinkworks.com/namegen/
I love this. I used it to make up one of the character names in Hospital. Trouble is, I cant remember which one it was.
5. Lulu Titlescorer
http://www.lulu.com/titlescorer/
I dont take this at all seriously but its fun putting other peoples titles in. You have to adjust the other inputs below, or it always scores 10.2%.
6. Brendans On-Line Anagram Generator
http://www.mbhs.edu/~bconnell/cgi-bin/anagram.cgi
Im not sure why this fascinates me, but it does. I like how primitive it looks.
7. The Hundred Commonest English Words
http://www.askoxford.com/worldofwords/wordfrom/revisedcoed11/
Disappointingly, this doesnt have a box to fill in, but its suggestive particularly when remembered alongside the Wordcounter.
8. Think Baby Names
http://www.thinkbabynames.com/
I like to know the meaning of the character names I use. There are dozens of similar sites, most of them in bright pink and blue. If you can find one that cuts to the chase faster, and doesnt advertise, let me know.
9. List of most common surnames
http://www.answers.com/List of most common surnames
Combined with Think Baby Names, you should be able to name a character from anywhere in the world. I was going to type christen there, but thats clearly missing the point.
10. TV Tropes
http://tvtropes.org/pmwiki/pmwiki.php/Main/HomePage
Ive only just found this. But Ive been looking for it all my life. Thats how the internets meant to feel, isnt it?