I use a program called Phrase Express and they have a free version, but businesses are supposed to register a copy at 39.95 which is nothing, so I paid for my copy.
PhraseExpress Autotext - Autocomplete text Utility
I use it not only for forms but for typing common phrases and even web site addresses. Partly for time savings and partly because I have carpal tunnel. For example if I type "hth" it autotypes - Hope this helps and best of luck! If I type 5blog, it types out my whole blog url.
I just upgraded and it has a new feature I just LOVE. You know how you hit copy, it saves it in cache so you can paste into another doc or web form or whatever. Well this saves everything you copy into cache, so if later in the day you need that site description for a directory submission or whatever, you just click the one you want and it pastes it for you.
But another free and easy thing to use if all you're doing is form fills is the Google toolbar. If all the forms are basically the same info, name address, email etc that works with the push of a button. THere is also a Firefox extension I've used before that’s more full featured that's free. Can't remember the name right now.