They are just as handy to jot down prayers or thanksgivings during the day. Carry a small pad of them with you. When you hear about something that needs prayer, say a quick arrow prayer (see March 1) and then jot it down for more prayer attention later. If you remember something that makes you especially thankful, jot it down for rejoicing, too.
Keep track of your prayers for a week this way and you might begin to see a trend in the things and people you pray for. You might notice that you are offering more thanksgivings, too because you are more aware of things to be thankful for because you are writing them down!
If you are someone who is totally paper-free, you can do the same thing on your i-pad or note pad on your phone, but there is something about the tangible effort of writing the prayer or thanksgiving on a piece of paper. Plus you can stick the note up on your computer or bulletin board or refrigerator as a reminder.