If you want to REALLY make sure no more McCainiacs get nominated, starte getting active NOW.
Run for local Republican Committee positions, be willing to get out there and walk the streets, stuff envelopes, man phone banks and contribute money for CONSERVATIVE Republicans.
Throw solicitations from the RNC in the garbage where they belong.
I agree about the RNC. They are a worthless organization void of ideas. They are just a bunch of suits there to collect a paycheck.