So do you know how you often go, “I’ll just browse the Web / check Facebook / see what’s on Twitter / watch a bit of YouTube for 10 minutes and then work”? And the “then work” part never arrives as you are stuck on Facebook or YouTube for the next 4 hours?
So what you should do the next time is say “I’ll just open my book / document / article, etc and look at it for 10 minutes and then go do Facebook and YouTube. ”
Worst-case scenario, you’ll do 10 minutes more work than you’d do otherwise. Best-case scenario, you’ll get into it and do more than 10 minutes of work.