Simple Tips to be active -
Take an after-dinner walk
Walk during your breaks and at lunch
If possible, schedule a "walking" work meeting
Park in the farthest spot from the grocery store or mall (it is easier parking as well).
Avoid valet parking (saves money too)
Take the stairs instead of elevators or escalators
Walk while your kids practice or warm-up at their sporting events instead of sitting in your comfy chair (this one I know from experience).