I am reasonably new to the Bass and am thoroughly enjoying my time on it so far.
I can easily find C, G, A and D on the E and A strings and can slowly, very slowly, navigate from there but in one note increments. I needed an aid to learning and generating muscle/brain memory.
So, heres my method. I have one seven sided die (Dungeon and Dragons type shop should help 
) and one six sided die 
.
With bass in hand, cast the dice. The six sided die gives an odd/even number (odd numbers relate to A and E strings, even numbers relate to D and G strings ), the seven sided die gives a number relating to a note (1=A, 2=B, etc). The job then is to locate the required note on those strings.
For example a roll of 1 (six sided), 4 (seven sided) would mean finding a D on A and E strings.
A roll of 4 (six sided), 3 (seven sided) would mean finding a C on D and G strings.
If it sounds a bit complicated, thats my fault for not explaining well. Sorry. But I find it brings a bit of fun, variation and unpredictability to finding your way around the frets. I tend to practice scales when I land on a note, so hopefully double the training.
Hope this helps.
Sharpy
