Start Slow....Build Speed

Always, always, always start slow and build speed gradually.
Remember that playing slower allows you to look ahead in the music and prepare for the next note or chord change. If you play too fast, you may miss notes or your chords might sound sloppy.
'Tis better to play slowly error-free than it is to play fast with a lot of mistakes.

Once you have mastered the music at a slow pace, you can speed it up gradually until you reach the tempo you are aiming for.

Use a metronome to control the tempo.