Vim tip: using :set

Vim tip of the day: if you enter the usual :set command as if you were going to set an option, but hit return without adding any, it will give a list of the current options for that document.

Tip of the day #2: if you want to set more than one option, you can string them together in one command, e.g. :set wrap nonumber linebreak rather than having to issue them one at a time.