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Releases work best when you can do as much of it as possible in an automated way. Then you can also do things like automatic nightly archives and you can verify in CI jobs etc that the scripts work.
I have personally done several hundred releases of my Open Source projects over the years, and my single best advice is: use a checklist. It took me a while to learn this hard lesson myself and I do not know how many releases I have screwed up in my life simply because I forgot some little detail along the way. I have learned that if I have every tiny little detail in the release process documented, I can not only make sure that I can follow it and do an identical release the next time, I can also at some point in a much easier way hand over that duty to someone else, with great confidence that it will work.
Remember to update the checklist when you change the release procedure.