1. Get a system down that works for you. Use a routine that allows you to do the job without driving crazy and running so that you stay healthy.
2. Work for the weekend. Just keep telling yourself, "Only a few more days." Once the weekend or vacation is there, try not to think about work at all.
3. If possible, take a route with a newer package car. I had a newer car with power steering, brakes, and finally an automatic for my last 11 years
and my body felt a lot better.
4. Try Glucosomine Chondroitin. I went for a routine physical and my Dr noticed that my knee cartilage was a little loose. I told him that you don't jump off a UPS truck for 25 years without some deterioration and he suggested it. Some Drs disagree, but it seems to have helped my knees, unless it was just a combination of that and the newer car with the lower step. It's worth a try though. It's supposed to help cartilage repair in a natural way.
5. Don't bring the job home with you. I saw a lot of drivers over the years that were on the verge of a nervous breakdown because they couldn't ignore the harassment and always took the job home with them. It's not good for your mental or physical health. It aggravates management more when they can't see that they are getting to you.
These hints helped me make it through 31 years at UPS and I got out fairly healthy mentally and physically and I am now happily retired.