Moonlight in something fun. A day job in accounting might mask dreams of being a singer or launching a landscaping business. But as long as new employees avoid conflicts of interest or using company time and resources for their side gig, there's no reason to avoid exploring these passions. They could turn into a second career, or at least a second income.
Find new (inexpensive) hobbies. The transition from college student to working professional often completely overhauls one's social life. The days of fraternity parties, spontaneous dorm room hang outs, and Frisbee-throwing on the campus quad are over, and new activities fill the void. The problem is that those new activities, such as happy hours, golf and travel, are often expensive. Filling the social calendar with more affordable ways of having fun, such as community soccer tournaments, hiking and game nights not only save money, but are a great way to make new friends.