Getting Back into Playing after a Long Break?
Go here for some helpful hints.
http://music.stackexchange.com/questions/3237/get-back-into-an-instrument-after-long-break
And you will need to Brush Up on your Fingerings…
Tone Generator for Tuning
http://www.harmonize.com/metropolis/online_pitch_pipe.htm
Metronome
http://www.metronomeonline.com/
Music Dictionary
http://www.naxos.com/education/glossary.asp?char=A-C
http://www.musicoutfitters.com/dictionary.htm
Handy Transposition Charts
http://www.bluemorris.com/music-and-jazz/68-instrument-transposition-chart
Music Theory