When dressing, tuck your tee shirt into the waistband of your underwear to keep the blue shirt from riding up.  Don’t just jam the shirt into the trouser.  Keep the fly open and tuck the shirt in.  Reach around inside the trousers and pull the shirttails down to straighten them, this makes the shirt more comfortable and minimizes wrinkles. 

After closing the fly, the front of the shirt across the top of the slacks, ought to be smooth, but not taut.  Place your thumbs between the shirt and trouser and work any wrinkles at the belt line back toward the hips.  This gives the shirt a crisp wrinkle free front.  Now buckle the belt keeping your ‘gig’ line in place: the buttoned edge of the shirt, in line with the vertical dent on the belt buckle, in line with the outside edge of the zipper flap.  You can wear shirt garters or a tailor’s sub-belt to keep the shirt from riding up.