Yep, Julie and Russ said it all:"practice,practice,practice". Also, there are no set rules on speed, blades, or techniques. I agree with the "sweet spot". I have a certain speed that allows control and cuts the wood without pushing. The only time I slow my speed is on thin wood with fret cuts that are close and on portraits. My technique changes at times. On corners for instant, sometimes I spin the wood and sometimes I back up and turn the blade and sometimes I will cut over to the other line direction and cut back to the corner. Hope this isn't confusing to you!LOL In other words, watch the tutorials and select the techniques that are comfortable to you.
Tony,aka,Toneman