If anyone knows what it's like to busy yourself into a blue funk, it's me. Sometimes I can't even begin because I am already behind, and I'm quite certain it'll suck anyway.
Don't beat yourself up over it, and realize that you are only human, and there ARE only 24 hours a day (MMV, stop working on Alacrity;s death ray, and finish my time machine....I need more time!) Look back on all the things you have accomplished, and look at that wonderful family of yours.
Enjoy Disney, have fun...and the Mythbreaker guys will have staged a coup by the time you return