Choose a 'trigger' action you already do to initiate the new habit you want to form.

Trigger New Action

Resolutions feel huge, requiring a lot of mental bandwidth and loads of constant motivation to keep up. Resolutions are easy to decide on but tough to maintain daily.
Habits, on the other hand, are naturally easier to do. They are positive daily activities and actions, are brain-friendly, learned behaviors.

Resolutions Don't Work

Create or adjust your environment to provide you with cues to take on the positive habit of action.

Adjusting Your Environment

Repeat your actions daily, while evaluating them on a weekly basis.
Enable faster growth of your positive habit by following the process of repetition and evaluation.

Repeat And Evaluate

Tell yourself what a good job you are doing, and get your brain to be happy, by celebrating even the smallest success.

Celebrate

Start small with something you already desire or like to do, to ease out the entire process for you right at the start.For example, if you plan to write more, why not buy a journal and a pen that you want to use, and keep them handy, facilitating the writing habit naturally.