4) Decide what the main theme of your puzzle will be. It's ideal for that main picture to fill at least three or four of the squares in your puzzle grid.
5) After you've drawn your main picture, add lots of smaller details all over the page to make sure you have something in each of the squares on the puzzle grid.
6) Use as many colours and shapes as you can. Not only does this make the puzzle more fun and colourful to do, but it also makes it a bit easier to put together too.