Wait, What...busy busy

I know it seems I am constantly apologizing for not writing more frequently.  That I am giving excuses for not sharing.  This is not my intent.  I am realizing through much therapy and self reflection that as I strive for a better work life balance, I continue to overcommit to things.  I have passions and beliefs and I want to help.  Does this make me a target for being a sucker or being too nice.  I admit it, I have a NICE problem which leads me to a YES problem.  
So in that I have to readjust some goals.  We are still on the 40lbs for 40, and though I may hit 40 articles for 40 I am not stressing.  I have to say that they may not be blog articles per se.  I have reviews and other things I am working on that I want to stay current on.  So I am going to count these as well.  I hope this is ok with all of you?
Recently though I have had to say to clubs and meetings and such that I am very happy to help, but I cannot be on the board.  I cannot always attend a meeting, because my kids go down at a certain time and this mama wants to bathe her children and put them to bed.  She wants to see them for the 4 hours she has with them daily.  If a meeting is at 7, unless I have another meeting beforehand, I am not going home quick feeding my kids and sneaking out of the house for them to realize I left them.  I want experiences for my children.  I want experiences with my children.  So I am not going to that meeting, sorry.  I may only spend an hour on the couch watching horribly chosen TV with Mr. WaitWhat but it is the time I have with him and I do not want to sacrifice that.  
That's my story.  What are your tactics?  How do you balance?  How do you make time quality?