"I have to remind myself that if I do everything for everyone, then I won't have any energy to be there for people in the future."
I really liked this comment "Intellectual Christian Geek" left on my Boundaries post, and just thought I'd highlight its wisdom.
Our energy, time, resources are not infinite. 5 minutes I spend helping Person A is 5 less minutes I have available to help Person B, or 5 minutes less I have available to do something nice for myself.
The $50 I allow Person C to guilt-trip me out of is $50 less I have to spend on my kid's art supplies or new clothes.
With God's help, I'm learning that serving Him doesn't mean giving others ALL of my available time, energy, resources.
Sometimes, the best way to take care of ourselves is to guard our energy so we don't spend it on activities that bring us no real joy or benefit. And to guard our time, so we don't fill it up with frivolity and then later not have enough time to take care of what's really important. And to guard our resources (money, stuff) so we don't end up surprised later when we have nothing to show for all our effort.