Affiliate Marketing Secrets

I am looking at starting an online business selling primarily ecigs and vapor items. I have a friend that already has an established online company and is doing quite well selling only starter kits, so I know it is doable. I create websites so the tech portion will not be an issue….
So far the logistics I have are direct from manufacture or a distributor from alibaba and going nuts with online, physical, forum and WOM advertising. I will buy a bulk quantity from the manufacture and any loss of supply will be reordered before depletion.
I have a selection of 6 styles, 6 flavors and 3 color options for each.
My niche will be the hybrid vapor of health products ie: vitamins (C,B) herbs (Chamomile, passion flower, green tea) etc…marketing with HEALTH as the primary concern
….Any input or recommendations thus far? any positive info will HELP!!!!