If I didn't drill all the holes in one fell swoop at the outset, I reckon I'd just lose patience and 'forget' some of the finer details. Once you've got a hole in the wood, it can't be ignored.
Working on more than one project at a time doesn't suit me. Okay, I may have several projects undergoing finishing at any one time, but I'll only cut one project at a time. Apparently my approach is somewhat unusual approach for a scroller.
Gill