When I find I have tons to do and can't figure out where to start at home, I grab my handy kitchen timer (or use the timer on my cell phone) and clean in each room for 10 minutes. You would be amazed by how much you accomplish! Take a 10 minute (timed!) break after 30 minutes or so and keep going.
Once you get through all your rooms you will feel like things are under control and you can tackle more intricate projects.