Agree that you should have a vocal coach. The biggest stars have them too, a coach is an absolute must if you're singing with any sort of frequency and it sounds like you are. Definitely step one.
Then there's the obvious. Don't smoke, drink, or do any other drugs. Your voice is one of the first parts of your body that gets affected. Drink lots of tea and water.
When you feel like your voice isn't 100%, you need to figure out what's wrong and by no means should you push it, whether that means taking some time off, going on vocal rest, or some sort of treatment.
Everyone has their personal, at-home remedies they use like certain drinks, routines, etc. You can google a bunch of them online.
Scratch and claw for every day you're worth!
Make them drag you screaming from life, keep dreaming
You'll live forever here on earth.