As a new starter then your mentor should be your sponsor.
If you are unfortunate enough to have an unresponsive sponsor then he or she is probably to busy recruiting 100 PSA's per day
You could also look to A to A if you can get past the capatchure logo's.
If of course you are a BTL or above there is no better mentor than our own leader Mr Carson. He is probably the best motivator ever born, and I do mean that. The man's vision is incredible.
If you are not happy with that soloution, perhaps you could go higher.