Remove the stems from the broccoli and cut into very small pieces. IF you want to blanch the broccoli follow the next few steps. If you're short on time or don't mind raw broccoli you can skip blanching.
Fill up a bowl with very cold water and a few cupfuls of ice. Bring a pot of water to boiling point. Add in a heaping tablespoon of salt.
Make sure the broccoli is 100% dried before tossing it with anything else (especially the dressing). I like to use a salad spinner and then let it sit out for a while. If it's any bit wet, it becomes too watery.