• Accept that you are going to procrastinate sometimes
• Disconnect from your smartphone. Otherwise, it will demand your attention subconsciously 
• Be mindful with your emotions when you catch yourself procrastinating
• Focus on one thing at a time, to avoid feeling overwhelmed
• Take breaks
• Celebrate your accomplishments.

... is how the brain changes (for better or worse) in response to repeated experience: the things we do often we become stronger at, and what we don't use fades away.