I know people that put their vehicles in drive before starting ( seems like it). My brother n law has a 08 Sierra and drives off after 5 seconds of starting, and the transmission slips everytime! I treat mines like myself: wake up, brush my teeth, wash my face, put on clothes and personal hygene and I'm out the door. By then you should be woke. least till your temp gauge move off cold. I wait till mines idle at 1000 rpms before I even leave the driveway.