Prioritize what really matters to you and pull back from the things that are low on that list (like things you might do because of someone else and not really for yourself).
For me that most important commodity is TIME, so I choose to spend it with my loved ones, rather than stressing about housework and what society thinks I could or should be doing.
Don't get wrapped up in other people's lives and drama -- learn how to stay detached.
You can love someone and still not try to take on all their issues for them.
In fact, it's usually better if they solve their problems themselves, and have a good friend that they can vent to when the going gets tough, or who can offer impartial advice when needed.