About to retire but need some advice

I can only speak for myself. If I've given the impression that I know it all, I'm sorry that's not how I meant to come across. I just know that when I retired I did not want to be tied to any part time low income job. If I got the chance to go somewhere tomorrow I wanted to be able to go. If I was going to be the responsible worker I always was and show up when expected, I just felt I might as well stay where I was making good money, keeping my seniority and benefits. If you think you would enjoy volunteering then try it. If you like it and it gets you to that age to draw extra then that would be great.
I worked with too many people that said"just one more year" and then die or have health issues right after retirement. There's no longevity in my family, so my choice was to get out and enjoy it while I can.