hi,
Not sure for reps and workouts, but i keep a detailed macro nutrients guide and exercise amount. I use excel for this, and have rigged the formula to give me a last 7 days run down.
http://www.sleepingplanet.com/fatbloke/fatbastard.xls
(unhide the columns to see how the targets are set)
I use calorieking.com to keep track of what i eat, i've found it realy really helpful. basically sign up, then ignore the calorie intake thing, click nutritional targets link at the bottom of the calorie box and enable the ones you want.
e.g. i set mine to Fat:98 Protien:185 Carbs:220 and during the day the little bars fill up and tell me how close i am to hitting my goal.
*no the buffometer column isn't based on anything other than how I'm feeling.