the way i see smoking weed every day is much better than drinking every day, both for your mental health and physical health. the best way to deal with drug tests is to avoid them, however, if your job requires them at some point, they should give you advanced notice; in that case, stop smoking until the test, drink lots of water and do lots of fat burning exercise, as THC is stored in fat. smoking while driving is a risk, if you get pulled over for any reason and they suspect marijuana they will test you and the guidelines for 'intoxication' for pot is very wishy washy as it depends on your tolerance etc. if you smoke every day, it will take up to 60 days for your body to completely get rid of all traces of THC. keeping healthy: try not to slip into the stereotypical stoner of sitting around and losing motivation, instead, use weed as a way to enhance your life, be proactive and change the view of weed for everyone.
hope this helps