It's always a good idea to freshen up your property before putting it on the market to sell. Deep cleaning, a fresh coat of paint, and a little curb appeal can go a long way. It's a good idea to make any repairs that may have been deferred. Try to look at the home from the buyer's perspective. You don't need to renovate, but most buyers are not looking for new projects. If something's broken, fix it. You may also want to have your house professionally staged.
Read my blog post on preparing your home for a quick sale.