Practice, Practice, Practice. I spend alot of time shooting free hand jsut for that purpose. Now, I will say that I do use my sling when shooting freehand. I wrap it around my left elbow when shooting right handed and hold it tight. It really does work and if I have to take a shot while standing or walking I bring my gun up and wrap the sling all in one motion. It is sort of second nature now but I still practice it quite a bit.

Tom