How to Improve Your Aim in FPS Games
Quick answer: Better aim comes from a consistent, not-too-high sensitivity, keeping your crosshair at head level, and short daily aim-trainer practice. Lowering sensitivity and fixing crosshair placement help most players fastest.
Warm up and benchmark: open the aim trainer.
Dial in your sensitivity
Most players use too high a sensitivity. Pick an effective DPI (your mouse DPI times in-game sensitivity) that lets you turn smoothly, and keep it the same across every game so your muscle memory carries over.
Crosshair placement
Keep your crosshair at head height and pre-aim the corners enemies appear from, so you barely have to move to land a shot. Good placement beats fast reflexes.
Train and warm up
Spend a few minutes on tracking, flicking and target-switching drills before you play. Short, focused, regular sessions improve aim far more than long unfocused ones.
Set up your gear
A high refresh-rate monitor, a wired or low-latency mouse, and a stable frame rate make your inputs land faster and more predictably — the same factors in improving reaction time. Warm up on the aim trainer before each session.