A method that's been working for me to get me to focus and zone in on work. I think it's pretty effective and should hopefully not require an immense amount of self-discipline, at least to start. Feel free to let me know how it goes, or share stuff that been working for you, as I'm still interested in other methods to use for myself too.

Timestamps:
Intro 0:00
The barrier - intro 0:59
The barrier - physical 1:19
The barrier - software 2:44
The barrier - why it can work 3:33
General tips 6:04
Conclusion 8:14