Last fall, I wrote a blog on stealing time (basically taking stuff a writing coach spouted at us slacking dissertation/thesis writers) and it comes down to actively using everything outside formal time at the computer to get prepared to write. (http://online-novel-blog.blogspot.com/2012/10/stealing-time-to-write-some-tricks-and.html) .
At work, my teammates have different styles of project management, but I found that for many people we will find efficiencies in process when we have a deadline hanging over our heads. (This is why I put myself on a deadline with a schedule for the serial. I knew I'd find a way to post. )
One thing the coach talked us out of was the mindset of finding huge chunks of time. A lot of the people in that workshop were parents or had jobs. When you start with the mindset of needing "an hour a day" when you are full time on other things it's intimidating and discouraging when you can't meet that goal. We were backed down to smaller increments of time. I'd honestly back down the hour and start with 15-20 minutes every day. Then you'll start feeling you can use other 15 minute blocks to accomplish certain tasks, particularly prep tasks. And eventually you'll be able to find that magic hour you want, but not necessarily in one block of time.
But I'll try to get into the weeds of a schedule of a typical week.
That said, my schedule works because I have a master outline that came out of several brainstorming sessions over the course of two years. Ideally for a shorter serial, you have it before you start and maybe do a review/revision at appropriate timepoints. You can make it a lot of fun or involve others if you hate/can't sit at your computer or desk.
For example, at first I was using post-its (totally for real: http://plumgirl.tumblr.com/post/5594707234/the-post-it-pile-of-plotting-grows-alright-the) because I LOVE POST-ITs and colors, and visual diagrams. But you can't travel around with a stack of post-its, so this stuff eventually got distilled into a small notebook/Word document/Livejournal and then eventually moved to Google Docs because I figured out how to access it at work (on break), phone, tablet, computer, whatever...
I have a general idea of word output, but my approach has evolved from words to "What do I want to accomplish" this week. So while the first few months were more about meeting the word goal for the week, later my goal was to finish a scene or key interaction or plot point. (And my word count started getting really all over the place. I had a minimum, but I had no maximum other than what I could handle.)
I'm actually one of the most inefficient drafters you can have out there. You'll see my process below could be tighter if I learned to not rely on so many opportunities to revise. That said, I'm too trained to take a painter's approach to things (vs. a sequential artist who commits the entire linework and concept first before coloring) and therefore I have to build in time to hack at the text.
Tuesday - Usually do not do much because I'm recovering from the Monday update. If I find 30 minutes, I will go to my list of notes , outline, kick around ideas. This can happen on a document or on my Google Drive, or notes on my phone, or whatever I can later come back to. I'll make decisions on the direction of the next installment and I might literally narrate /talk myself through some dialogue blurbs. I remember though mid-way through using this day to help me with continuity checking.
Wednesday - Still muddling through ideas. Brainstorming and maybe I'll start fleshing out part of a scene. This is a script essentially and very barebones. It's lacking in description and has a lot more dialogue or key actions. I think this is, with all the interruptions, like an hour but not necessarily all at the screen.
Thursday - Decision is usually implemented. Whatever time I have (1-2 hours) is just about working at the text. At times I toss things out if it doesn't work. While I usually have one element I'm addressing off my list, there's a lot of stuff I play with. Character interaction, for example, is not something I always plan for and so I try different things out. I try hard to make sure that I have a page or so done.
Friday - This is crunch night of revision. It's one I can stay up if I drink coffee after work. No one bothers me usually because my friends are too old now and sleep instead of play. That said, this is stream of consciousness work sometimes.
Saturday - Oh errands and life. Wake up and try to squeeze in an hour to look at what happened on Friday. (Fresh pair of eyes theory here.) Sometimes I like it. Sometimes I hate it and strike out what looks bad. I'll go away, put on a CD and think about what I read. Or if I think there's a problem with continuity sometimes this day is where I go back and read again. Usually by evening I'm back with an attack plan. This is where it's do or not do. I try to feel good about my direction. I like to think this is the "80% there" draft.
Sunday - I leave the hours of writing until after dinner so I have social time or recreation time. Usually this is 3rd/4th look at my text and is cosmetic. I can set up the posting formats if I feel good about it such that Monday is left for just reading for errors and posting.
Monday - come home from work, read the update a few times (on the blog preview copy) for mistakes. I usually don't rewrite unless things weren't good during the weekend. POst on site. Post on Wattpad. Try to remember to add text to long-form version I have been formatting for ebook. Tweet/tumblr/whatever else I usually do to promote.
This is not an efficient process. I work in an OCD environment where we do a lot of checking/re-checking so I've applied some of the editing process from that to my writing. I think a person who gets really good first drafts out or isn't obsessed with continuity could probably insert another update with no problem as long as they have a clear plan for their next series of updates.