Some author groups provide a variety of benefits including classes, tweet groups, review opportunities, online writing conferences, blog tours, interviews, and vetted author services providers. Two I can recommend are ASMSG (Author’s Social Media Support Group) and RRBC (Rave Reviews Book Club). Getting into ASMSG is free, but requires a recommendation from an existing member, which helps keep the membership focused on more experienced writers. Anyone can join RRBC by signing up on their website here. They charge a membership fee, but the more involved you get, the more benefits you’ll receive. If you decide to join, be sure to tell them I sent you!