Find ways to alter your current life to be healthier.

E.g. if you catch a bus why not get off 1 stop earlier and walk the rest of the way. If you drive why not park further or catch the bus instead? Take the stairs not the lift etc.

If you already feel you walk alot and cant add more in, try walking faster.

Just by altering the everyday things like this it all adds up and is often better than trying to implement some heroic workout routine. It also leaves you with a lot more energy and in a better place to start more serious workouts.

Same can be said for diet too.