plastic bags

We used plastic bags everday for many ways. Plastic bags are easy to  use but they maked big problem for environment.
How can reduce plastic bags ?  When we go shooping whith our own green bag.
How reuse them?  I allso cut scraps plastic bags and collection into the small box, I reuse them to clean kitchen.  It is very good ideas to clean oilly pleace and things.
How reduce plastic bags?  We can reuse them many times and reuse them replace rubbish bags.