www.setgame.com
Check out this site to play a daily Set game or learn to play Quiddler-a word game. Have fun.

www.zeeks.com
I highly recommend the brain teasers here. You will find them under the games section.

www.krazydad.com
There are hundreds of sudoku and kakuro puzzles here for you to print. They are leveled from easy to hard so you can work your way up! Reason on!

vincentwoo.com/files/petals/
Okay, you figure it out.

www.vocabulary.com/
If you like words, word play and word based puzzles, then this is the site for you. Happy metacogambulation.