I thought I'd share this source of free graphpaper for various stitches:

Charlene Booth, the designer of them, has done some very painstaking work to provide us beaders with accurate bead graphs. They are lovely!

My hint, such as it were, is to print your graphs using the 'Draft' setting in your 'print properties' options. Not only does this save ink, but it also makes less distracting lines for colouring in your design.