What I should do: go use the work out room. Or the pool. Or walk to Target.
What I want to do: stay hunkered down in my haven made safe by the do-not-disturb sign on my door.
What I will do: vacillate for a while, work myself into a tizzy totally unjustified by my two alternatives, and finally give in to one or the other and/or possibly create a third option that involves very little benefit to either my physical health or my mental peace, thus negating my tizzy and pacifying my guilty sense of what I really should do and what I really want to do.