You can do several things at once, but only if they are easy and undemanding. - Daniel Kahneman

Unless there is an obvious reason to do otherwise, most of us passively accept decision problems as they are framed and therefore rarely have an opportunity to discover the extent to which our preferences are frame-bound rather than reality-bound.

a stable relationship requires that good interactions outnumber bad interactions by at least 5 to 1.

if you have had to force yourself to do something, you are less willing or less able to exert self-control when the next challenge comes around. The phenomenon has been named ego depletion.