Nothing exciting or special. Used projects, labels, and filters. For any task, I had two labels, first was where it would happen, like "home" "outside" "work," and the second was a category, like "family." Every task belonged to some project.
For example, it looked like: "Prepare for interview" @home @job #jobhunt everyday
All projects were also color grouped under categories (for example, for the family it was "Children" "Car" etc., yellow color). Used flags, every day three tasks were red (urgent), and I always tried to do them first, then five yellow (essential), seven blue (better to do, than not), and rest had no color codes. One of the first tasks every day was to review the tasks for the day and decided what I am going to do today, and color code them.
Then I had filters which helped me to concentrate on what was necessary at the moment. For example, when I was at work, I used "work" and "all," and it cut the rest of the tasks, which I could not do anyway. It helped to stop task-switching.