Some people handle weed better than others. I smoke every night and I have 5 classes and work around 35 hours a week. I function fine and maintain a GPA over 3.5. And I try to run a few miles a few times a week and I never have problems doing it. A lot of people who smoke were already screw ups before they started smoking. That's why people tend to think smokers have like IQs of 50 and can't focus on anything. Any person with good self control can smoke everyday and still function in their job or education perfectly fine.