I think I'm in a similar position to you, so I can hopefully give you some tips. I live 10 hours from the nearest certified reliable Pokemon Tournament and there are absolutely no leagues/gatherings within at least a two hour radius from where I live that I am aware of. Due to this, I've dropped competitive play largely, although I do try to keep in the loop using these resources:
PokéBeach
PokéBeach is my main source of competitive knowledge. Between threads made and the PokéBeach Skype community, I have been able to keep in the loop of the competitive scene.
PTCG Online
The official PTCG emulator is really the only way I can play any sort of competitive battle due to my isolated location, so the engine is vital in keeping my competitive play acceptable.
I actually have made
a thread looking for advice similar to yourself, which may have some advice that you are looking for.
EDIT: Now, on rereading the OP, I think you're more looking on advice in getting points as part of playing competitive. I believe that achieving large amounts of points requires significant travelling to large sanctioned events, such as Cities and States.