Smoking/ Drinking Tips And Tricks?

Now I know people out there will say don't smoke/drink it's bad for you. I know that but I have my reasons to do it and I'm going to anyways. I've smoked and drank a little but not much because I've had to go home and I don't want my parents to smell it on me. Is going over to a friends house for 2 days (monday morning to Tuesday night) long enough to smoke/ drink and get the smell off before going home? Any tips and tricks would be apprecited, I know a few but I'm planning on doing much more than I have so I need some experienced people's help.
Smoking/ Drinking Tips And Tricks?
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