The best way? Get your MEI.

One hour of giving instruction in a twin is equivalent to 10 hours of regular dual given. It is also much more valuable than going to a time building program and doing long cross county's.

Granted it is expensive. I never had a lot of money to start with either. These kind of things take time. I instructed in single engine aircraft for a year before I got near the twin. Sometimes you just have to pay your dues. None of us are entitled to a jet job or an airline career; just because a person can get through their commercial does not mean anything.