Trouble with breaking on runway

[nem]

As I said, this only applies to jets (and many turboprops, though those may lack the speed brake and/or the reverser). Which aircraft and model where
you trying to land?

The general approach is to press F2 to get the thrust lever from forward thrust to reverse thrust. You will hear the engine sound change distinctly
and in spot view you should be able to see the reverser mechanism at the engines in action. Also you should arm the speed brake before touchdown
(check for the keyboard shortcut in your FS keyboard settings, I only know the one for a German keyboard layout), so the speed brakes are extended
when the plane touches the ground.

Furthermore if your aircraft is equipped with autobrakes the correct setting for a normal landing (no emergency, sufficient runway length) is 1 (weak
autobrake). In case of an emergency or shortfield landing adjust accordingly (use "max" if in doubt).

Also don't forget to shut off reverse thrust somewhere between 80 and 60 kts. The FSP copilot will call out both speeds for exactly this reason.

Only from about 60 kts and below start to use the manual wheel brakes. Brake to around 35-40 for a highspeed turnoff. After having left the runway and
coming to a stop either the speed brakes will be retracted automatically (PSS Airbus e.g.) or you should do it manually, retract flaps then while
you're at it.