Man every time this happens. I don't take my vyvanse for a while for various reasons, and then one day I pop one. And now I'm all GET ALL THE THINGS DONE and wonder why I don't take this ***every day like I'm supposed to.
In school, they put me on ADD medicine, I stopped taking it every day because it stopped working, but if I took it every once in awhile it helped.
...I don't really have ADD, the teachers in my middle school were kinda *** which I didn't respond well to as a kid. I think they thought every student was the same so they just took the same approach and it didn't work on quite a few of us.