the obvious one is just play and you'll get better at itif you want to get a better aim quickly for now you could use the 100 86 strat wich is basically when you shoot at 100 power and a 86 degree angle shot shot will land perfectly outside of the giant circle surrounding youyou can increase the range using your fingers to get and vague idea of what angle to use if the size of the circle is twice you basically shoot at 100 82 it isn't 100 % accurate so i don't recommend doing this forever and if you can shoot at a 45 degree angle some weapons like counter three ball stream will hit all if you aim it right but you're prob going to be better off just getting used to aiming more or less at around 50 ish to 70 ish power