I'm somewhat embarrassed to admit this, but Ritalin seems to make me... smarter?
Not only can I tackle harder math problems that would've overwhelmed me before, but I can do so for longer stretches of time, and the solutions come quicker.
But also smarter in terms of avoiding stupid things like consuming sugar, eating too much or wasting the entire afternoon on something pointless.
It makes me very goal seeking in everything I do, and that's something that's been missing before.