That's a great list and all very true!
Since you asked, here's what I'll add:
I totally agree on the toilet and seal, but replace it with a Niagara or something similar that doesn't have a flapper. A lesson from a $700 water bill from a 3 year old toilet.
Buy decent faucets, the cheapest ones fail quickly.
Standardize your paint color and use a professional paint store, not a big box store that makes it differently every time.
Use plastic flooring products. No carpet, hardwood (unless it's already there) or cardboard/laminate.
Don't rent to smokers. Even if they swear they'll never smoke inside, they will, and will drive your other tenants nuts and it's expensive to get the odor out.
Get your tenants to pay online so you aren't chasing the rent check.
Be direct with tenants. When they violate the lease, tell them in as few words as possible. State it as fact, not in an angry way, send them it in writing as well, and follow through with any consequences you've promised. Ignoring it or trying to be nice won't make the problem go away.
When you have a bad day, remember that this is worth it in the long run and don't give up!