Article Marketing - write 100 articles a day about your topic, submit them everywhere with a submit button
Forum marketing - join 3-10 forums and post 10-50 times a day, make your signature amazing
Blog commenting - find 10 blogs in your niche and comment on every post
The problem is that quality and quantity are limited by time, but aren't equal. So say I have one hour; I can write 12 readable articles or 6 good articles, or 3 great articles, or one amazing article. The key is balance... 6 is probably best.
Most people error on the side of quantity over quality, and wonder why their CTR sucks or why some forum banned them. I'm not saying quality always wins; you need to target different keywords and expand.
Just remember: It shouldn't be perfect; you can always improve everything and there's a law of diminishing returns. Everything you do should be good/great; that will bring in more visitors than the guy next you writing 300 spun articles.
By the way, this rule in null and void when it comes to list building. Your goal is to make them want to hear everything you say... That is how emails get opened and sales are made.
Think loyalty is dead? How many of you read a thread just because of who posted it? (Such as Zeus66, Scott Ames, admin, etc.) Give nothing but quality and you'll get quality back.