Here's a few off the top of my head:
- Tidy your working environment (desk, hard drive, etc.)
- Pomodoro technique
- Organize work day in max. 3 blocks of 1-3 hours each
- Define the ONE thing that will move the needle
- Single task
- Listen to alpha waves while working
- Meditating
- Delete all social apps from your phone
- Consider swapping your smartphone with a flip phone
- Focusing on being a PRODUCER, not a CONSUMER
- Block time wasting sites online, if you can't handle it