Practice taping while standing and while laying. I get the best fit while standing against a wall. The most important thing is having the right size diapers to begin with. I fluff my diapers before I tape one on. I bring the front waistband to my bellybutton, center everything up. Front wings should reach the sides of your hips. Bottom tapes go on first medium height (too low makes uncomfortable, too high causes leaks). Top tapes should fall out 1-2” from waistband. Don’t tape up too tight, just snug. The tapes should not fall out on the hips (diaper too small) nor should they fall out almost touching (diaper too large) The elastics take care of everything else. Happy diapering!