Re: STRING AND FRETBOARD MAINTENANCE
One thing I've done to prolong string life is to deep clean the fretboard more often than I used to. I might do it now after every three or four string changes, or when I simply notice a lot of gunk on the board (as opposed to once or twice a year, as before). Dirt from the board instantly transfers to the strings when you play and dirties them faster.
Maple boards get just as dirty as Rosewood, but because they are lighter so you don't always see the gunk (think white car vs. black car). Keeping my boards cleaner made a huge difference in string life, and the guitar is much more playable with smoother bending and easier string slides without all the gunk slowing you down.