Personally, I've found by operating a planner for my work life and a planner for my personal life. This has been hugely helpful for me as a balance is something I've struggled to achieve for many years.
My work planner is for literally that; I schedule meetings, jot down deadlines and keep track of what I need to do each day. This means at work I'm organised, everything I need is in one place and that place is work. Things don't creep across into my personal life.
My personal planner is exactly that: birthdays, addresses, doctors appointments, even TV schedules. The wonderful thing is I can do this without worrying about what I've got to do at work the next day.
How do you use your planner to get a work-life balance?