Those of you who enjoyed Judge Aldisert's logic puzzle (puzzle here; solution here) would probably enjoy Sudoku. For those of you who are already Sudoku addicts, I offer my Sudoku worksheet. I suggest copying the numbers from the puzzle onto the worksheet by pen, then solving the puzzle by pencil. If you're already addicted to this little game, then you already know why the worksheet has the little numbers pre-printed inside each box. Enjoy.
Here's an addictive time waster: online Boggle. Warning: Once you start, it's hard to stop.
Reverse a Word is a simple but addictive game. The rules: (1) Write a two-letter word. (2) Reverse that two-letter word and add one letter to the front or back to create a three-letter word. (3) Reverse your three-letter word and add one letter to the front or back to create a four-letter word. For example: to - not - tone. Your score is the number of combinations you can think of. With a little effort, you may find yourself on the site's honor roll, which lists the top 100,000 players. Warning: If you start playing, you may not be able to stop.