Strange, but something I am rediscovering coming back into model making after nearly four decades, is that only a small percentage of time seems to be spent in actual building the model. It all goes in a succession of short bursts, then coming up for air.
At least 30% of time is in researching a topic method or technique, - which is always enjoyable as you plan how best to achieve the next stage. Not forgetting reading the instructions. I am a great believer in the I.T. Help Desk term RTFM (Read The * Manual).
20% is when underway building you you suddenly find you need some special screws, fittings, different sealant etc, that brings things to a temporary halt. In this case try to revert to something else you can prepare or get on with. Stop start !
However this causes another 10% of time in packing away some gear away and relaying out the workbench for something else.
A slightly frustrating 30% is when you have to wait for the next bit of epoxy to set, or waiting for paint to dry. You need to keep an eye on epoxyed parts til they set, but resist the temptation to 'play' whilst they do.
That only seems to leave 10% for actual construction, or am I missing something here? Tell me I'm not organised enough !
Maybe thats why I have always loved detailing, you can plough on for hours.