The following is from the Boeing 737 Flight Crew Training Manual:
"Avoid touching down with thrust above idle since this may establish an airplane nose up pitch tendency and will increase landing roll.
If the speedbrakes do not extend automatically, after the airplane settles onto the runway, move the speedbrake lever into the UP
position, and initiate reverse thrust. Fly the nosewheel down to the runway smoothly by relaxing aft control pressure. Do not attempt to hold the nosewheel off the runway. Holding the nose up after touchdown for aerodynamic braking is not an effective braking technique.
To avoid the risk of tailstrike, do not allow the pitch attitude to increase after touchdown. However, applying excessive nose down elevator during landing can result in substantial forward fuselage damage. Do not use full down elevator. Apply wheel brakes smoothly with steadily increasing pedal pressure as required for runway condition and runway length available. Maintain deceleration rate with constant or increasing brake pressure as required until stopped or desired taxi speed is reached."