I began writing when my kids were little, raised a special needs child and managed to write, edit and promo 37 (published) novels in 15 years - and I didn't have big chunks of time. The trick is to fill the spaces. I used to carry a digital voice recorder and a mini word processor, always had a notebook and camera to capture inspiration. I even had a dry erase board in the shower to make notes on those ideas that always came at the worst times.
Now a phone covers for all but the dry erase board. Now I work full time, still write novels and blog 3xs a week.
The skills are the same. The key is to catch bits and pieces when you can. Let ideas brew in the back of your head so when you sit down to write, you have a lot of the work done. Get up early on a day you need to write a post, or stay up late. Make it a priority and it will get easier each time (except when it's not, of course).