Sax412,
There should also be a pre take off check for IFR, which hasn't been mentioned. If you are off on an IFR flight, a normal IF Instrument Check would include:
Attitude Indicators Check (in the hover, pitch nose up/nose down, AI follows, same left bank/right bank)
Compass/HSI Pedal left/right, check all HSIs/compasses follow
Navaids On ground, tune and ident a local aid and check needle
I have a few IF check lists which you may find helpful, but most are helicopter type specific.