Play with the trim on the boat without a skier behind it. Different speeds and trim levels will make a better/flatter wake. Really commit to your wake crossings. Ski THROUGH the wakes, not over them. What ski are you riding? A wide trainer/beginner ski will never slice though the wakes. I grew up skiing behind fishing boats of my dads. First was a row boat with a maybe 9hp on it, then a 25hp 14', then upgraded to a BIG 40hp 16'! I learned ALOT of BAD techniques back then and it took along time to un learn all that bad form, but I didn't have people, or a forum like this, to teach me different. Watch you tube videos and ski a lot. And stay OFF the tail of the ski, no matter how much it seems like a good idea, you paid for a WHOLE ski, so use the whole thing! Good luck.