Questions about life - Q.1

Yesterday, as I was heading for home, I was reflecting about life - something I do very often these days. Nothing very major, I hasten to add, just wondering about why we do the things that we do, and also why we often don't do those things that we know we have to and in fact must do!

Is it just procrastination? Is it a fear of upsetting the applecart? Are we hesitant to change the ground realities, because we are so used to doing things in a set manner, handling routine tasks in the same oft repeated way, almost by rote - without thinking? Why would we prefer to keep our minds and brains out of these mundane tasks? Do we actively keep these systems on hold - or is it these systems that run us - the entire organism, directing our moves?

Does our brain try to conserve energy by preferring to use pre established connections rather than set a new road map - lay new tracks, recruit new neurons and establish new cross connections between these new players? Surely an energy guzzling exercise?

Or is it because, during those periods, our brain is active doing more interesting things that it actually likes doing? Like day dreaming, remembering and reliving pleasurable moments of the past, or giving free rein to imagination and fantasy, and creating situations that would give us pleasure.

Leading me to my take home question:

Do some brains actively avoid energy guzzling exercises all the time, preferring to 'time pass' - as I am doing now?  ;-)