Struggling at work - looking for tips.

After many many years of being a mechanic for large and small shops and on my own. I can say the one mistake made by us is chasing the flat rate time the manuals say it should take. Speed tends to result in more oversight. Now that I'm older and turning wrenches again after retiring from the fire dept. I work at a pace that I feel good about and the hell with the flat rate time! I also have always marked a tightened bolt with a white paint pin, this works for me. I think slowing down a bit might help you.