I workout less than 5 hours a week and am in the best shape of my life, eating the right foods is like 95% of the battle.
This.
Would you rather go run a couple miles and burn 150-250 calories (varies of course) or just lower your portion of dinner/stop eating out/eat healthier. You might be a little hungry in the beginning couple of days, but your body adjusts. No plan needed, just count calories, eat less to lose weight.
If your trying for cardiovascular health, then you need to exercise.