I am assembling a first aid kit for my next hiking trip, and I would like to print and include a basic cheat sheet with essential information on how to treat common ailments. Also, I would like to have a separate short guide for CPR, with clear visuals, so it is the first thing people see if they open the kit. I have searched online but have not found anything satisfactory. Does anybody know of such material?
As with learning or improving any skill, the best advice is to take a course or read some books.
Depending where you live, there should be many urban first aid courses and a lesser number of wilderness first aid courses to take. There are also a large number of books on first aid for different situations. Some course providers also provide books.
In either case, there is likely to be some kind of "cheat sheet" -- a quick reference guide for critical and common medical problems. Note, however, that such "sheets" are often quite substantial; more like booklets.
That being said, here are some: