Hello Robosuplex: I see you did not receive any replies to this post, so I thought I'd take a whack at it. I'm not certain I really understand what you're experiencing. It sounds like something that is anxiety-related to me.

I experience situations where I'll be doing one thing & some idea for another "project" will come to mind & suddenly what I'm working on seems trivial & my new idea seems irresistible. So then my tendency is to go off & pursue the new idea, leaving what I was doing dangling in the wind, so to speak. Now that I'm aware of this tendency, I'm a bit less likely to get caught by it. But it still happens. At one time, this tendency also used to involve the expenditure of money to purchase supplies for the new project... most of which never got used.

To some extent I think this is a coping strategy. Focusing on something... anything... takes effort. And if it's something you're not really all that interested in doing, that just makes it all that much harder. For me, the main thing that has helped is simply my awareness of my tendency to do this type of thing. Also, if I can delay the urge to fly off into the new project, sometimes when I think about it again a few hours later, or perhaps the next day, by then it has lost it's luster.

Beyond that, since this appears to be anxiety related, some anxiety reducing activities such as physical exercise, meditation, breathing & relaxation techniques, etc. may be helpful. These kinds of things are, however more long-term sorts of aids. Their effect is cumulative over weeks & months of practice.