7-mil orange disposable gloves. I won't touch a tool without putting them on. 7-mil to protect my skin from all the things that want to bleed me and orange so that I know when my gloves are contaminated with grease or oil.
How about the long lost, seldom found (or seldom achieved): 'Organization' - i.e., putting things (tools, parts, etc..) where they belong, BEFORE they leave your hand?
Or, if in the middle of work - 'putting it (whatever 'it' is) back in the caddy, tray or area (again, before it leaves your hand) you've selected for the tools you are currently using on that 'project' - to save untold time 'looking for it', time and again?!?