There are a few websites that I read on a daily basis. On MakeUseOf.com I came across a very good article that had a load of 14 Great Cheat Sheets.

The first few are to do with Microsoft Office programs, which I wasn't really interested in. But if you scroll down, that page there are browser and, the best ones, Linux Cheat Sheets. These cheat sheets include VI/Vim ones as well.

Well worth a look if you dabble in Linux from time to time and if you are like me, have a memory of a goldfish.