If you have never read The Blog of Tim Ferriss, I suggest you give it a try. Tim is the author of the NY Times Bestseller The 4-Hour Workweek and the blog does more than just talk about the book. In the blog, there are numerous time saving techniques that everyone can use in their lives.
This post is on memorizing large numbers and gaining the ability to recite them forward/backwards. Did you ever wonder how anyone did it? The trick lies in system mnemonics and picturisation of the words. Pretty easy actually, visiting the post will illustrate the process in detail.
When you're all geared up and saving lots of time from work to do what you truly love (reading blogs), be sure to leave a comment on how you found this post.