Folding a fitted sheet is a tedious and untidy task for me until i recently saw Martha Stewart on the Oprah Show where she showed a tidier and simpler way of folding fitted sheet. I tried a numerous number of times before I got the hang of it. Here's how she did it :-
There is a foolproof technique for folding a fitted sheet. These instructions are for a right-handed person; just reverse them if you're left-handed.
Read more at Marthastewart.com: How To Fold A Fitted Sheet - Martha Stewart Home and Garden