Over the years, there have been several tuning guides made to assist sailors with boat set up and sailing technique. Take a look at the links below:
A Basic Guide to Europe Dinghy Rigging
Europe Guide for Racing
Lars Johan Brodtkorb's Downwind Technique
Shirley Robertson's Europe Tuning Guide
North Sails Europe Tuning Guide
UK Sails Europe Tuning Guide
WB Sails Europe Tuning Guide