By Cam Vigliotta Your primary goal today is simple: celebrate 4/20 in whatever manner feels authentic to you. And your secondary goal, while not so obvious when you woke up this morning, is now equally clear: shop the Session Goods 4/20 sale that takes 20% off sitewide. For the uninformed, Session Goods designs some of the most stunning pipes, bongs and smoking accessories we’ve ever laid eyes on. Each piece is elegant and artfully crafted, worthy of space in your living room knickknacks collection when it’s not in use. Not sure what to get? Consider picking up the aptly-named 420 Bundle that …