Set realistic goals: making a commitment to increase your physical activity is an important first step. Setting a realistic goal for yourself and planning what you need to do to achieve this goal can help keep you focused and committed for e.g. daily 20 minute walk during lunch break.
Get your friends involved: Exercise is better with friends, try joining a sports team or going for a run or brisk walk with a friend.
Take the stairs: An easy way to increase your daily physical activity is to take the stairs instead of lifts wherever possible.
Stand up & walk for phone calls.
Take regular breaks from sitting by walking around and stretch your legs.
Make it fun! Exercise shouldn’t be a chore. If you don’t enjoy it then you won't be able to keep it up for long. Try to find activities that you enjoy and add variety.