It will depend LARGELY on what kind of traffic you can drive to your blog. Profitable blogs have readers. There’s no way around that. (If you are struggling with traffic, I LOVED – and by loved, I mean have read twice and will read again – Lena Gott’s Traffic Transformation Guide. She details how she went from 17k pageviews to over 400k pageviews in ten months!)
Be professional. When you submit a résumé, don’t type it in ALL CAPS and please don’t avoid the caps lock like the plague. Know how to use it without looking incompetent. Write in complete sentences with proper grammar. Of course, there will be exceptions, but even with the exceptions, you must keep it professional. You’re building their view of you.
I will also tell you that I believe, based on my experiences so far (and the experiences of my bloggy friends) that if you are not willing to invest, you will either not succeed at all – or it will take you a very very long time. The money I have put into this blog has not only motivated me to succeed, but it allowed me to succeed, by learning (quickly) the things I needed to know.)
Your first step in starting a blog is deciding on a niche. Maybe you've already selected a niche. Maybe you haven't. Your niche will essentially be your content angle. What will you write about? What information will you convey? Will it be about a specific industry? Maybe it will be about a certain area of skills or personal development? Whatever it is, decide on it now.
Wow really great list of tips, even for non beginners! I agree Ahrefs is probably the best SEO tool for bloggers, but honestly Google Webmaster Tools is the first place to start to monitor your search traffic. Ahref is really expensive, and for new comers, probably overkill. I recently started a new blog, and am more than happy with the data provided by Webmaster Tools.