I've found this to be incredibly helpful in the last few days of using it, so I thought I'd drop it off and see if it helps anyone else. ^^ I know it's not directly comic related but time management is a huge thing for comics so it sorta fits, yeah?
https://www.wunderlist.com/ Wunderlist is a browser + app to do list that is pretty versatile. You can set tasks to be daily, weekly, monthly, and yearly (which works great for my particular schedule with my comics as I do phases based on daily assignments). I can also organize by folder, lists, project, and set reminders. Bonus, I can tie it to my phone so I can get reminders or input on the go so I can juggle everything from comic to home life to just about anything really. I've got my husband tied to the list we made for groceries and it's helped out so much because no more asking for things we need and one of us forgetting XD (You can make group projects with these but beyond just grocery lists I haven't got to test that one yet).
I also really like it because you can not only see what is overdue (if you set deadlines), but you can see what is due for the day as well for the next week, which I enjoy being able to work ahead and visually see how far ahead I'm getting.
I do have minor complaints. For example, I don't like I can't set something, say, M-F, or have things turned off for my day off. But they're still working on things and they hope to bring in features like that from what I found so fingers crossed. I don't know the differences from the paid versions and the free ones; I use the free Windows 10 App and the Android app and haven't had any problems.