During the pre rut, I tickle the antlers for about 30 sec. and follow with a grunt. Ill do this about every 45 min to an hour. During the rut, I crank on the antlers, scrape the brush, and stomp. I do this for 30 sec. to 1min. I also finish with two grunts, a short grunt followed by a little longer grunt. I also will add a bleat sometimes before I start rattleing. I will rattle about every 45min. to an hour. Dont know if this it the best technique, its the one I have had luck with.