Want to be a faster yoyo player? Use a heavier yoyo for a decently long period of time, try to go fast on it, and when that time period is over, switch back to your comfort zone. You should notice the increase of acceleration.
Want to have more flow or have your tricks be smooth? Use a responsive, i.e. a FHZ or a Classic for a few weeks, and practice your tricks on it until you have them down at a pace you would like them to be. Like the speed, go back to your comfort zone and see the increase.
Like to hit your tricks more precise and accurate? Here’s the simplest answer: Practice it 100 times Sounds crazy, but it’s sort of this concept: “You are a master if you can do 1 thing 100 times, not 100 things 1 time.”
Have any other tips? Just reply and I will try to keep up and answer them. I hope this helps ;D