I'm getting ready to brew again. (don't fall off your chair) While I generally know what to do I can't remember stuff so I use a computer to help me with that. Beersmith remembers my recipes and knows how to calculate abv, color, ibu's, etc. I usually grab an old recipe and tweak it. This way I'm able to rely on past results and I can incorporate something new. I am very thankful for Brad Smith and his program Beersmith.
Note: I don't get paid by Brad. I just like his stuff. I do get a bunch of traffic from his blog post about growing hops though :-)