re: Top 5 can't-live-without-them woodworking gadgets?

My mechanical pencils ( .3, .5 and .7).

My shop made blocks, with locks, that slide on four different old try-square rulers to set widths, depths, etc.

Push thingies that care not about running over or into blades.

Every layout tool I can get my hands on (circle and oval templates, letter templates, 360 compasses, rulers, width bars ……..).