I always carry 2 small "journals" with me to the field, both are 6.5"x4.5" and about 1/2" thick and they easily fit into my flight box. The "red" one I keep "flying" notes (tips I pick up about landing, taking off, flight checks, setups, throws, throttle settings, and just all kind of "random" little factoids that come in handy (like which size screw fits what part; you know, all the crap you usually forget 5 minutes after you hear it )

The other is a "green" one of the same size that I log the date, time, plane, wind conditions, instructor/buddy-box, fuel %, time in the air, any "quirks" (like the engine skipping or running a little rough or a control surface not responding adequately), whether I'm using Hi or Low throws, and "general" impressions of the flight.

I picked up these little journals at the local "Dollar General" for $2 each and they're also small enough to fit into my pocket so when I visit a store, I can remember what I was supposed to look for, brand, price range, etc.... I make all kinds of "notes" in the red one based on interesting tips in magazines, this board, mfg spec sheets on some of my equipment, parts I "need to buy", parts/planes I "want" to buy (that's a LONG list [&:] ). Like I said, I write down all kinds of stuff in it; even club member's phone numbers. But the "green" one is STRICTLY for flights, conditions, and any issues that came up (or DOWN!)

Computer programs are great, but I like to sit down RIGHT after the flight, break out a pen, and take 5 minutes to make a few notes about it. Unless your laptop is a part of your flight kit, a computer program isn't going to give you that "immediate" ability to write down your "fresh impressions".