At any given point we have a thousand thoughts that we can focus our attention to. If we choose to focus too much on the things that have not served us, we risk the important things that need our attention and energy. We risk a potential good outcome by marring it through our inattentiveness.
Conversely, if we donot make sure that we have important tasks that need our attention, we risk our very minds, as they regurgitate useless happenings from the past over and over. Thankfully, choosing to focus our attention on what serves us, is largely upto us. And so is the choice of engaging in meaningful busy-ness.