The method also depends on the niche of the product you choose.
Filter methods by your skills and existing resources, tools etc.
I wouldn't say that the method of promotion depends on the
niche but rather that the source of traffic is different
with each niche.
Mike.
It's pretty obvious it doesn't work on eg. gambling niche.
Why not? You can build an authority website and social pages which evolve around gambling tricks and techniques and rank them (white hat) in the same way you would do for a dating website. Same methods but different sources of traffic.
Mike.
Interesting, so just for a newbie completely starting, what would you recommend (which method?)
email marketing is the best coveting way.
I think that it really depends on what you are good at and what you like to do. e.g Article marketing works for some and is easy and enjoyable for some, for others it does not work at all and is really hard work.
Slightly off topic but maybe the mods could consider putting a sticky or two in the CB section with frequently asked questions or a collection of the best threads over here? As I'm noticing the same questions keep being asked over and over again.