For me a lot of it is just feels natural, but If I drill down into that a bit,
-sometimes it's greed (if I make this call there could be $$$ on the other end of it)
-sometimes it's fear (if I food with hydrogenated oils it will do nasty things to my body)
-sometimes it just happens (I work out pretty mch every day because that's what I do).

So with very few exceptions that I've never thought about much, I've never need to do a lot of strategizing in this area.

In client work on motivation, I usually bring the focus to why they don't want to do X, clear whatever that is, then they usually go do it without a lot of extra amping of motivation.

-Brian