Take one very lovely book of shetland shawl patterns
Add computer software for making your own charts
Find some cobweb yarn and a pair of slightly oversized needles
Decide you like a chart that will work out to be 52 stitches by 84 rows
Give up and go back to looking at the pictures in the book
I’ve launched a sock pattern on Ravelry, Seaside Bunting Socks. The pattern can be bought via Ravelry. There’s no need to be a Ravelry member to do this just use this handy buy it now link.