How not to bitch out of your new year resolution:
Do not confuse resolutions with wishes. Wishes are wishy washy non-specific mind rambling rant about what you want. Resolution's dictionary definition is "a firm decision to do or not to do something." Now, to make a firm decision, one need this decision to be concrete and actionable. Using the most popular resolution as an example, weight loss, an actual resolution is to lose specific amount of weight by a target date, and laying out diet and exercise plan to achieve that. If you are still at the "oh, I want to be fitter" stage, than call it what it is, a new year wish. If you actually thought out a step by step plan, your chance of success will significantly go up.