Everyone’s different, but for me, it’s a matter of (1) being medicated and (2) making an active effort to do “the thing,” whatever that may be.
That initial hump doesn’t go away and can actually be worse with medication if you get distracted.
E.g. my day-to-day is very productive if I make the active choices to get out of bed at hh:mm1, be online for work at hh:mm2, and actually follow through. If I fuck around or am unmotivated (nebulous concept I know), I can easily waste 4 hours doing absolutely nothing at my kitchen table.
The effort part gets easier with routine, in my experience.