When I start working on an idea, gradually I get too excited that all my focus shifts to it and that affects my day job and my other daily chores. So I have to put it off. Please note that it's not fear or something, but the happy excitement that overwhelms me. Does anyone faces the same kind of situation? If so, how do you keep a lid on that excitement, while still staying motivated to work on it, and along with that keeping a balance with other areas of your life?
Blog about it. Writing clarifies thought... and editing a day later will help you focus on what matters. I keep a private blog for this purpose. Keeping it private helps me not focus on the blog as a goal, but the ideas. I used to just text friends all the various thoughts I got excited about... but I learned that you gain a lot of momentum by just letting people see what you have done rather than telling them what you will do or want to do.
A great way to handle the excitement is to get it out of your system. Why supress it? Give yourself a couple of days to be as excited as you like, and then make an agreement with yourself to settle down to the job at hand once you've had your 'fun'. Then you don't miss out on being excited (why should you), so you feel better and are probably more ready to move on to what needs doing next.