One way that I eased into and maintained my habit motivations last year was by reading:
Better Than Before: Mastering the Habits of Our Everyday Lives. By Gretchen Rubin
I focused on one of Gretchen Rubin's "habit mastering" philosophies each month. I highly recommend it to anyone hoping for a bit of strategy and encouragement when sticking with new year's resolutions, goals, forming new habits, etc.
P.S. Trying a new habit for the new year? Learn how to create a short action plan for success!