u can memorize the all so famous DO re mi fa so la ti do.
play a C note since its the most obvious note from the do and hum. close ur eyes and play a random note on the fret board, any string/fret. and hum that too, now hear the original C note in ur head and count up or down the Do re mi fa so la ti do, and figure out which note it is.
once u get to figure out certain notes the rest ull learn as well, and suddenly ..................
even with the fret board memorize the dots know the notes on those dots and soon as you have those figured out its easier to just say ok so this is A# or whatever.
thats how it worked for me, oh yea and i used to write down all the notes on an empty sheet with flats and sharps accordingly to where im going.
'i dont have low self esteem, it's a mistake. I have low esteem for everyone else' - Daria