[header] How to get away with smoking inside [title] Wait until night. [step] Why? If you act as if you are going to bed, there is a less chance of your parents bothering you, and they won't be in your room for the rest of the night. [title] Get a blanket. 
[step] Put it in the spacing between the bottom of the door and the floor. This will make it so that smoke won't escape from your room into the rest of the house.