When Iam building I have a few tools I would not want to be without. There is the hobbyknife, the steel ruler, a sandingstick and... my handdrill.
I use is a lot but the problem is you have to change the drillbits every time you need another size. Last month I wrote down the drillsizes I use most and I came up with 5 populair sizes.
So I ordered 4 more handdrills and I made a good looking socket for them and now I never grab wrong when I need a drill.