Most lifters' ADD comes in the form of an inability to stick with a lift/program long enough to make real progress, so this is something new. Given that you'll probably get bored and stop reading before reaching this sentence, I'm not sure why I'm typing this, but as long as you're doing compound lifts and training them progressively, three lifts per day can take you far. Three workouts per week with a squat, press and pull in each is a good way to train; take a look at the sticky, particularly the Rippetoe 3x5.