Yes, my life is full. I have kids (three of them, as a matter of fact), I homeschool them (because I'm a little nutty), I work part-time from home (not a lot of hours, but still), and deal with all those other pesky responsibilities of adulthood (not always well, but that's another issue).
There's nothing particularly spectacular about me or how I managed it. The short answer is, I make time. I try to cram all of my big responsibilities into the daylight hours and once my kids go to bed, it's time for fingers to hit the keyboard.
Plus, I probably don't sleep enough.
There are a few things I can share that made this possible and I think they apply whether or not your life looks much like mine - because, really, we're all busy.
Be honest about your time wasters
Social media? YouTube? Binge watching series on Netflix? We all have things that take up more time than we care to admit. I'm not saying you shouldn't have down time. We all need to veg out a little. But often we spend a lot more time than we realize on things like messing around on the internet. Once I started being honest with myself about how much time I was actually spending on those things, I realized I could probably cut back and reclaim some lost hours.
Be honest about your commitments to other people
I have to say "no" a lot, even to things I might otherwise enjoy. But if I spread myself any thinner than I already am, I'd be see through. Part of finding that work/life balance is knowing what you really have time for, and what you have to let go. I stick with my priorities and try to be honest with what I can commit to - and say no when I can't.
Get your family behind you
I couldn't do what I do without the support of my family. My husband is obviously on board - we spend our date nights worldbuilding, brainstorming plot points and fleshing out characters and scenes (because I have the best husband in the history of ever). My kids are part of it too, even if they aren't helping directly. They ask me almost every morning, "How much did you write last night?" and they love to try to get out of schoolwork by tempting me with an afternoon of writing. "Mom, we don't need to do math today. Don't you have some writing to do?" My whole family has been a part of this process, in their own ways, and there's something to be said for sharing the experience with them for the example it sets. If you don't have a family (as in, spouse and kids), the support of friends or loved ones can go a long way toward keeping you motivated.
Lower your standards for the stuff that doesn't really matter
So I've never been a Martha Stewart. I'm kinda messy, my husband is a lot messy, and my kids are, well, kids. They're makers and builders and creators, and we do EVERYTHING in our house. We live here, work here, play here, write here, create here, do school here. It's a mess, most of the time. But you know what, that hardly matters. As one of my friends pointed out to me recently, my kids aren't going to grow up remembering how clean the house was and I'm not going to look back with pride on my sparkling counter tops. They're going to remember the experience of growing up in a house that values creativity and following our passions. I'm going to remember the thrill of writing and publishing - doing what I love. Sure, we need to keep up a basic level of cleanliness, but I don't do elaborate crafts, or bake my own bread, or even make my bed very often. I take care of what's important and I leave the rest for later.
Because, after all, I gotta write the next scene...