Gym memberships are great and group classes are awesome, though they are not for everyone.
One alternative is trying an online at-home circuit, guided by an expert. You're essentially letting a trainer into your living room via the joys of technology, and these types of free fitness circuits accessible to everyone have proven wildly popular on YouTube.
With this in mind, The Huffington Post Australia worked with fitness guru Emily Skye to create this custom workout you can do anywhere, anytime. All you need is a phone, laptop or tablet. No gym, and no equipment needed (save a chair or firm bed for the tricep dips).