The first thing you will need to do is move everything out of the space and give your floors a good cleaning. I vacuumed mine first then mopped them with TSP a few times. After the TSP, I mopped them with plain water.
Next, you will want to tape off any areas that you do not want to get paint on. I was able to skip this step because we pulled our baseboard up for the renovation and there was nothing else the paint could get on.