Atomoxitine for the past few years. Recently I have tried modafinil to supplement it. It's like a lightweight version of stimulants. I find that I don't need a normal 100 mg dose for it to work. 50 mg is enough, and I think even 25 mg it has a noticeable effect.
I am experimenting with Adderall on one or two days per week, then modafinil for 2-3 more, with atomoxitine everyday. (I basically supplement my strattera Monday through thursday, and occasionally on a Friday to make work easier.) This seems like a really useful combination to me so far, and with this dosing schedule, it seems like it will take a very long time for me to build up a tolerance, if I ever do.
I love my prescriber. He knows that I am fairly cautious about medications, so he is willing to prescribe different things over time to see what works best.