Some-one may have said this earlier but I solved 90% of my tuning problems when I bought a Freshman 12 string. As part of the electric pick-up it has a built in tuner with the usual flashing lights and with a needle/display which tells you all the notes (#s included). I can't understand why they don't build this into all guitars with electrics fitted.

So tuning is easy - it's the playing I still have to figure out.