Find Your New Home - If you find a new home first and can vacate your current home, it might give you an advantage when you sell your home because a buyer can get immediate possession.
Do Your Research - Do your research on other homes that are selling in your area. Also do your research for your real estate agent.
Have an Inspection - Having an inspection ahead of time gives you time to fix issues, plus will give you a lot of bargaining power when you list your home.
Don't Waste Money - Don't spend a lot of money doing all sorts of updates. Talk to your agent and see what you can get done that will be the best bang for your buck.
Hire a Pro - Hire a professional Realtor that has knowledge about your area, that will price your home correctly and market it well to get it sold. Also be sure that you will have good, professional pictures taken of your home to have listed.
Price it Right - Making sure your home is priced correctly is critical. An overpriced home might make it sit longer on the market and grow stale and you don't want it under priced so that you can get the best price for your home. Your agent should know what the comps are in the area to get it priced accordingly.