Flooring is arguably the most important thing about a rental space. It is always used, always touched in one way or another, and will always get dirty. For this reason, many landlords prefer to put down hardwood flooring to carpet. Carpet can, and does, stain even with accidental spills or forgetting to wipe the mud off of your boots as you come running in from a storm. If you must use carpet, we suggest a darker color to not show so much dirt. We also suggest finding another option for the kitchen, bathroom, entry area, or laundry room if your rental property has one. Tile or laminate flooring is a favorite of many and is relatively easy to keep clean with minimal effort.
Making sure things are installed correctly is something that is incredibly important. If you are looking to add curtain rods or shelving, then we always suggest finding a stud in the wall to anchor it if possible. If you find that your previous tenant had hung something and tore part of the drywall out, be sure to replace it correctly and not with filler and paint. The next tenant may want to hang something in the same place only to have it fail and cause more damage to your walls. This is something that your new tenant should not be punished for, but it is something that needs to be fixed.
Unless you have a horrible tenant, the upkeep between residents should be minimal each time you have someone new move in. A fresh coat of paint or maybe some new blinds should really be the extent of your repairs. Always be sure to keep things nice and bright for your new residents.