//Always start a jigsaw with the straight edges.//
Never do a jigsaw puzzle in the conventional fashion. Instead do this:
1. Get somebody else to do it for you.
2. When they've completed it (some days or weeks later) turn the puzzle upside down using two boards so that the blank side is uppermost.
3. Take a pen and number the reverse of each piece in a fashion that suits you and that you can understand (e.g. A1, A2....for the top row, B1, B2.... for the second row, etc.).
4. Break up the puzzle making sure none of the pieces are lost. Alternatively get the person who completed it for you to break it up. Despite having taken three weeks to complete it, for some unfathomable reason they seem to revel in breaking it up almost immediately.
5. When you want to remake it (if you're inclined to do so, personally I wouldn't be) sort the pieces into rows and columns according to your numbering scheme on the back of each piece.
6. Assemble the puzzle face down (far easier than trying to do so from a miniature version of the picture provided on the box).
7. Turn the completed puzzle over using the same two board method.
8. Hey Presto! Done !!!