To master time, master your ‘internal triggers.’

Try to understand the uncomfortable sensations you're trying to escape when you reach for your cell phone or email account, then learn new techniques for managing that discomfort in a healthier manner.

Many people use to-do lists without considering the amount of time it takes to complete a task. 

Practice  "timeboxing" your schedule: assigning a maximum amount of time for an activity. It can help give context and limits to ambiguous tasks.

Use 'pact' like a way to pre-commit to an outcome when you know you're likely to get distracted.

This could be as simple as working with a friend for a set period of time where you keep each other accountable.