Scientific research has shown what works best for achieving your goals. For example, did you know that you are more likely to reach a goal if you partner up with someone else? In one study, couples that were part of a 12-month fitness program had a drop out rate of 6% compared to a whopping 43% for people trying to stick to the program on their own.
Check out this info-graphic for a quick perusal of helpful strategies for success.
For more info on building happiness skills through scientifically designed activities and games, visit Happify. (Updated from a post in 2015)