By now I keep a daily daily planner in wich I put my flights, along with crew names and weather, and even some remarks on what went down that day. i used to keep the regular tabular kind, but reading back to my notes kept like a flight diary is way more fun...
Don't take it too serious, here in europe they will let the electronic log provided by the company count, but it's no fun to read through those printouts...
And you have to prove to authorities the amount of landings (at least 3) in the last 90 days, if asked to show your licence, so keep recording, or carrying those prints...
Nic