A blog is nothing more than writing down what you already think, and making it interesting enough that somebody comes back. That definition opens a five part series for people who keep asking where to start, and it is deliberately unintimidating, which is the right instinct.
The branding post makes a specific point about consistency. If your colours, your logo, your site and the way you treat customers all say slightly different things, you are climbing a hill you built yourself.
The lead generation post promises a secret and delivers an approach rather than a trick. Show people how they get what they want, and the joining takes care of itself.
There is a review of a book about doing the worst task first, and one asking whether you would still press a button on a social network if it could get you arrested.
Read the first post of the blogging series if the question of where to begin has stopped you beginning.