If you want to lose weight, you absouletly need to be active. An physically active life makes you feel better. Practise is the only thing you should do to lose weight. Suitable practise depends on your body. But even walking can be useful. Just be active:)

And I think a suitable diet is more important than exercise. Because your body use what you eat and ıf you eat food being bad for health, you will be unhealthy. You should avoid consuming fat, specially saturated fat and sugar. You should also prefer high-vegetable diet. Certain amount of meat may be good for health but excessive amount not. Basically all excessive amount of foods are bad.

I usually go out for taking some fresh breathe. This is the best way, I think.