If you need traffic fast, I'd stick with paid ads or active communities in your niche. Black hat might give a short term boost, but it's usually not worth the long term risk.
Fastest would be blackhat but it should be in limits. Because any website owner would like his website to be ranking good in long term.
Blackhat methods work for making a quick buck. Whitehat methods are more about long term profitability. Also if you use blackhat methods you may get your websites/blogs flagged/banned so I'd advise using only whitehat methods.
Yes, these two, I use all the time and they work.
If speed is the objective then it is better to build traffic from payment and social medias than taking chances on a fresh domain with bh techniques.
If there is a new project to work on, I would try my luck with paid traffic testing nd community testing within the niche before I begin with seo.
To drive traffic fast i will try paid or social or community traffic before taking the entire site down the black hat route. imo short term traffic bursts are easy it is the sustainability that is difficult.
Black hat SEO to get immediate traffic is now dead with the latest google updates. You just end up with burned and churned domains within a few days.
