What are hair styles that are easy for daily use and isn't harmful for hair?

Ponytails and buns, but don't wear these too much. Also, you can use a spray of some sort when your hair is wet to get that "scrunched" look. I use Sprunch by Aussie and let my hair dry naturally and it looks just fine. I like this particular brand because it doesn't make your hair look and feel all crispy haha. Just stay away from heating products like curlers and straigtners/flat irons.