Long term relationships need a healthy value exchange. What this means
in simple terms is that you should always remember the equation

WIIFT > WIIFM

WIIFT = What’s in it for them
WIIFM = What’s in it for me

If you focus only one WIIFT, you will be drained or if you focus only
on WIIFM, you will drain “them”. So if at all possible, if you design
your life such that in all your relationships WIIFT is slightly greater
than WIIFM, we have a winning formula.