Tips and Mindsets for how to Handle Urges when doing Computer Work

I'm in a position where I need to do a fair bit of reading from home for my work, and most of it is done electronically(papers, emails, programming). I'm also finding that urges can be particularly strong in an environment where I'm alone at a computer with no one around.

Does anyone have any methods for how they handle this sort of situation? I need to stay at the computer for many hours to get a decent bit of work done, but unfortunately I find that I've got a strong undercurrent that seems to keep nagging me towards finding "just one little image". Additionally I'm told that getting near the two week period is where really strong/unpleasant urge waves can start, so I'm concerned this may become increasingly more difficult over the course of the next week.