Try these if you are bored!

[GM-Pandora]

Try these if you are bored!

Play Crazy Cube!
I got to level 20somthing, it's a game of logic, some levels are a pain, but it's interresting.
http://www.funny-games.biz/crazycube.html

Read some VG cats:
One of the best webcomic I know, there's even a few strips about RO!
http://www.vgcats.com/

Puzzle pirate:
Never played myself, but a lot of ppl at my workplace seemed "hooked" on this.
http://www.miniclip.com/games/puzzle-pirates/en/

Websudoku, if you like Sudoku.
http://www.websudoku.com/

EAthena forums, learn more about the emulator we use, what's comming ahead or see what other people have done and suggest it for here:
(you can even see some of my creation, I go by ~Pandora~)
http://www.eathena.deltaanime.net/board/