Hey man, I just wanted to reinforce to you that drug tests should not dictate whether or not you smoke. Don't let them determine a) whether or not you smoke, or b) what kind of job you aim for. When the time comes for you to get tested for a serious job after college, they will usually let you know WELL in advance. If your place of employment says they administer random drug tests, you'll have to decide then what is more important.

Less-serious jobs, such part-time summer internships and the like, will usually only require a closed-door piss test that can easily be beaten by getting a clean buddy to pee in one of those little hotel shampoo bottles. Just wear boxer-briefs and keep the bottle tucked next to your boys to ensure the piss is the right temperature in case the container monitors temperature.

What it all boils down to is that you should do what makes you happy as long as it isn't hurting others or yourself. If, at any point during your schooling (or any other point in your life for that matter), you decide that smoking is making you lose sight of your career and life goals, it's probably time to cut back a little bit. When the time comes, you'll know when it's time to stop. Some people stop after college, some continue until they're senior citizens. You just have to do what makes you happy, while still keeping the big picture in perspective.

and my bad about posting twice