To get vitamin C, the best way is to eat an orange like an apple. All of it, peel included. Seeds too. Choke it down! See how your mouth feels afterwards. It's like the Goddess Citrus herself descended from a very temperate heaven and had her way with your face.
I enjoy cannabis and have experimented with other substances because I love sensations. Cannabis, if you get good strains, gives all kinds of wonderful sensations. Eating, veging, video games, sex, all of them are better. Even work is better, if your work doesn't involve formal human interaction, counting high than 100 (you'll fuck it up), operating heavy machinery with exposed moving parts, or stuff you actually have to think about. So, that disqualifies most jobs for responsible use. Especially since most jobs have a manager who walks in every once in a while who would probably not like it if your eyes are red and you obviously don't have allergies.
Basically, the most important thing to keep in mind when doing anything is self-control. There are more important things to me than drugs. Many things. I have to get my degree so I can work jobs that are better than min-wage and I have to keep good relationships with my family and friends because I care for them and they care for me. Drugs, to me, are a hobby.
Generally, if you apply the "hobby" attitude it shouldn't get too out of hand. You wouldn't let a hobby dominate your life would you? Well, with some furs the fandom does seem to have taken over a large portion of their lives at the expense of family, friends, lovers, career, and general self-improvement, but they are bad examples. There are people like that in just about every fandom or hobby-community.
It's also kind of funny for me the paralels between the drug culture and the "decadence" culture of the late 1900s around the Wildeian era. Those silly Parisians...