Worth mentioning, most of materials you find online are still about basic stuff. Basic attributes, basic knowledge, nothing more then already known. Nobody will share a working tactic with others, cause as soon as everybody will be implementing it, it will stop working. The only tactics that are shared - are scams. And that's the only thing you should keep away from. Yet i also believe that an open mind can suck some background idea from the scammers too, what may become handy in one point.