Print the fingering chart for your instrument and keep it in your music folder.

Flute Fingering Chart 
Oboe Fingering Chart 
Clarinet Fingering Chart 
Saxophone Fingering Chart 
Trumpet Fingering Chart 
French Horn Fingering Chart 
Trombone Fingering Chart
Baritone Fingering Chart 
Tuba Fingering Chart 
Bells Fingering Chart 
Bass Fingering Chart