Carrie and I are using a marital aid. It's called Trello, and it's amazing. I think of it as the digital version of Post-Its on a whiteboard.
Since I was forgetting things I had to do for her, we use Trello to remind me nicely that I have to get stuff done. One card I had was to blog about Trello, which I can now move into the Done list. We have a list for restaurants we like, so we can instantly look up a place we feel like trying when people want to have dinner. We also have a list for people we like to keep up with, trips planned for the year, and running wish lists. We also have a general To Do list for things like picking up the dry cleaning.
Within a board, you have lists, and a list contains cards. Cards each have their own description, and you can interact with them in a bunch of ways. You can comment on them, add attachments like YouTube videos and photos, assign them to other members on your board, colour code them, add due dates, vote, and so much more! It's also super extensible, so it ties in with a bunch of other productivity tools. Check out their Trello Resources board for pro tips.
Trello is free to use and works in browser and most mobile operating systems, but you can pay for Trello Gold which has additional features. Sign up here for a free month of Trello Gold. If you sign up with that link, Carrie also gets another month of Gold, which helps her to keep me on track with my chores. Don't you want to aid our marriage?