There was a very large discussion on Reddit regarding this, and essentially it was suggested to stay as close to the 50th percentile of range as possible. Obviously, we all need *some* range, but the suggestion was that if you know you use 20% of your SOC/Range daily, you should charge to 60% and then it would get charged when you get home at 40%, keeping the "median" at 50% SOC. I only drive around 30 miles a day, so I'm planning to try to use 70% max SOC to help with longevity.
Now, there's also the caviat of a law of diminishing returns where the "stress" placed on the battery between 50 to 60% SOC is significantly (exponentially) lower than 60 to 70, then even further comparing 70 to 80, etc.
There are lots, lots, lots of Teslas where the owners have not gone to this obsessive-level type of energy management and they continue to work. I believe I was an Insta Story from Tesla saying that after 200,000 miles, the fleet average is 90% original capacity. That's outstanding. The typical capacity of my ICE vehicles at 200,000 is 0%, because they've almost always had a massive part failure that resulted in a new purchase instead of repair.
TLDR; Your plan of keeping it in the zone between 80 and 20 is fine. Charge it often but don't obsess. If you believe you'll need the extra energy from 80 to 100%, then charge it to 100%, but don't let it linger at 100 - start driving as soon as practical once reaching it.
Regenerative braking won't work above, what, 95% anyway? So be prepared for use of the friction braking.