Pick an angle and use it a lot until you have a good feel for it. I like angle 35 because it will never blow backwards under any wind conditions. You may also want to master a slightly higher angle like angle 50, for situations where you need to lob over obstructing land or a teammate's head. There are also fixed angle shooting formulas which tell you the power level to use in different situations... I will mention them here.
Fixed angle 35 shooting:
1/2 screen distance: 1.5 bars
1.0 screen distance: 2.2 barsOther angles
  1/2 SD 1.0 SD Angle 50 1.5 2.2 Angle 60 1.6 2.3 Angle 70 1.8 2.7 If you're interested, Dselb has a wind adjustment formula for angle 70 shots here.
Other normal shot pointers:
- If you prefer to use feel, just be aware that low angles are easier to deal with when there's tailwind. If there's a lot of tailwind, remember that a tiny wind difference will alter your shot quite a bit. You might find it's quite difficult to adjust your power in these situations, I recommend moving your boomer a little to compensate for tiny wind changes. This is especially true if you're shooting far away, moving boomer is a lot easier than finding the exact amount of power you need.
- Normal shots against the wind: When shooting against the wind, decide how much harder to shoot based both on wind strength and direction. The more downward the wind points, the harder you must shoot. In general you must shoot much harder against the wind using boomer than you would in 0 wind, often harder than any other mobile would need to. If you want to master against the wind shooting you can play for a while to develop great feel, or you can try some formulas to start making pretty good shots right away. Click here to check out my BJSL 42 shooting method and a few easier opposite wind shooting formulas.
Other cases
- When the wind is blowing in other directions, some very vague rules are: Wind towards the enemy makes the shot go further, but at low angles don't need to lower power a whole lot to accomodate this. Wind blowing upwards and towards messes up your normal shot the most, you need to drastically reduce power because the wind carries your shot forever. Wind blowing directly down or a bit down and towards requires adding a bit of power, usually no more than half a bar. Wind blowing diagonally down and towards you can almost treat as a normal shot, or you can use slightly less power.