There are no tips or tricks to getting in, since their selection process is naturally kept secret. However, according to the membership application (which anyone can download right here), you'll need to validate your involvement in the "creative arts," and tick off some major accomplishments. It also doesn't hurt to have a good relationship with a current member or two.
Since the goal is to cultivate a robust community of influential creative types (rather than, say, power-lunching Wall Streeters), dues are kept relatively low for its reported 1,100 members. Norwood charges an $800 joining fee plus $2,000 in annual dues, though if you're under 30 you qualify for a reduced rate.