I know exactly what you mean. That happens to me in the evenings when my Adderall XR wears off. I've just recently tried supplementing 5 mg of regular Focalin (not the extended formula) for when the Adderall wears off and to get me through the evenings. It works out pretty well and only lasts 4 hours so I'm able to fall asleep just fine. Just make sure you don't take it past 5 or 6 o'clock. You can also do that with regular adderall or ritalin. Hope this helps.
I only take concerta m-f. Only for work! Without it I would get fired for not doing anything. It makes me act wierd. My sence of humor goes to letterman. Normaly I am a Jay Leno. I get cranky when it wears off. I do not like taking it but it is only a work affair!