Fast workouts aren't always the answer. Walking is an excellent exercise; it will tone up your belly, legs, hips, thighs, so cellulite isn't so obvious. Aim for at least 30 minutes/day, but more if you have time (minimum 30 min/day, 3 days/week). You don't have to run or job, just go at a good brisk clip. If you carry a resistance band, you can work your arms, shoulders, back all at the same time.
Yoga is also good for toning, tightening.