How To Keep Kidney Healthy?

Hi there, I was diagnosed as a child as having a left duplex kidney. At the time, the doctor explained that I had an unusual set up as my spare kidney was acting separately to the main one and as it had all the necessary tubing off it, it was essentially a fully functional additional kidney. I was told if I had too many infections, this could scar the main kidney and they would both need to be removed. 30 years on and touch wood, I still have all 3. My question is, is there anything I can do to help preserve them?! Should I not be drinking for example? I don t drink a lot and when I do, its the odd glass of wine but I m always conscious that perhaps I shouldn t be having it. Any guidance would be greatly appreciated.