Whenever you're aiming for a goal that might consume a decent amount of time, maintaining Focus is very vital. However, Focus is the only tool we need when keeping our eyes in the prize. But for some reason, we get distracted and fail to accomplish that goal. That said, distractions dosen't have to be big in order to avert our goals, most of the time it could come in a small fraction. And failure to realize this little mistakes will take us off the course without our permission.
Moreover, we're surrounded with tools that will distract us, as such keeping our focus isn't always rosy or easy. And that's where you need conscious effort to stay in track while your goals are in progress.
In conclusion, one question I always ask my self before indulging into any act is; will this take me closer to my goals of vice versa, and if it isn't taking me close to my goals, I'll just ignore.