For running laps, I use my thumbs as dividers between fingers, which I can do with very little change to typical running form. For other stuff, this sounds lik

For running laps, I use my thumbs as dividers between fingers, which I can do with very little change to typical running form. For other stuff, this sounds like a great idea that I should try. How many times have I thought "did I remember to lock the car," then walked back to the parking spot?