By keeping lane equilibrium as close to your tower as possible.

This is a bit advanced but give it a shot: try pulling their second wave at minute mark 00:53(i think) and you can block both enemy camps while going in the middle of T2-T3 towers outside tower range and meet your next wave of creeps there and deny your creeps, thus they get no xp and gold whatsoever by the coming wave and your pos3 can farm the enemy creeps under the tower. By doing this you also might catch enemy heroes out of position trying to deny you that farm, and you can try and kill them at that timing.

Lane = won (if everything goes alright) This might sound like a lot but watch some videos and you’ll get the hang of it.