Isk making in 0.0 is quite different to empire...
In high-sec, ratting will earn you virtually nothing, and mining won't earn you much either... Mission running on the other hand, (esp. L4 missions) can earn you LOADS of isk if you know what your doing.
But yeah, in 0.0 the best way to make isk is either mining and then producing ships etc for people to buy, or ratting.
In a good system thats farmed right, you can have 3m+ of NPCs in each belt
Tripple 1.85m spawns aren't all that rare either
Bare in mind that most corps take a %age thoguh via tax. My corp takes a rather hefty 20% of everything i earn, but it is needed to pay for all the fuel / logistics that are needed for us to contribute to the alliance.
Meh, hopefully corp will do mining op soon so I can make a little more than I am right now on missions >.>