I live a pretty busy lifestyle, but there's usually always time where I can carve out a brew day on a weekend or an evening where I can kick off a kegging or bottling project. I find I have to make the time, though, focus on it and make it happen...I pick a day and that's the day unless something absolutely unavoidable gets in the way. (And then it's rescheduled for the next weekend.) I've really developed a love for brewing, though, so it's nearly essential for my well being anymore. Sometimes I feel lazy and just don't want to...but I make myself do it anyway and feel better for it on the back end.
Just this month I've come off of 70+ hour work weeks for a few weeks straight. I told the office to pound sand for a day and brewed on a Friday, it was awesome and I felt well deserved. I have the philosophy though that it's important to work hard, but if that's all you do, it's usually not worth it overall.
I also invest into tools that make things go faster. Whether that's a carboy cleaner, a bottle cleaner, automating my HLT, or whatever...if it saves time or lets me do two things at once, ultimately it's worth it for me.