This is what I keep in mind while executing tasks and hence successfully convert them in habits.

1. Study SMART: Consider constraints to the task like adding a time cap to them, select upgrading task,so on.
2. Avoid Context switch: focus on doing deep work rather than swallow work.
3. Focus on hard things: This could be done in your most productive hour using time blocking method, also give you a sense of achievement.
4. Work in pomodora: Use this to set target goals aka time bound task so you are aware of the work you are doing.