Ask your doctor to start you on a lower dose. Everyone I know started on 18mg and adjusted up until they got a good effect.

When I went up in dose and had some side effects, I mamaged it by going out for a run in anticipation of the meds kicking in. It's a lot easier to deal with sweating, heart pounding etc if you're exercising and I think it helped to have somewhere to put the extra energy boost.

It's also important to make sure to eat breakfast before or within 20 min of taking the meds, and to get sufficient meals, snacks and water during the day so you don't feel like shit when the meds wear off.

I now split my dose (not split the literal medicine, I don't think they're made to split) to take one part with breakfast and one part a few hours later with a snack or an early lunch. It staggers the onset and outset effects to not be as big.

There are also several other type of meds to try if stimulants aren't your thing.