Here is a handy little chart that you may want to print out. It has all the primary notes on the fretboard. The sharps and flats are not shown here. Sharps and flats are easy to identify, though. For example, to find an F#/Gb just find the note, between the F and G.

Note order: A,A#/Bb,B,C,C#/Db,D,D#/Eb,E,F,F#/Gb,G,G#/Ab