The basic foundation of a successful blog is the accumulation of your blog posts. The more you create, and the more frequently you create, and the higher quality of your creations, the better you will do and the more money you will make.
Why? Simply because that will give both your human visitors and the search engines a reason to visit your blog. The search engines check for updates more when they know that a blog updates often. The more they see, the more they index, and the more that can be found in searches. Human visitors aren't a lot different. If they know you've got constantly changing content and new reasons to visit, they'll come back often too.
Do you know what they call a web site that doesn't ever change? A cobweb site. Don't be one of those. Keep writing for your blog, and keep finding content you can add to your blog, and you'll soon be making money with blogspot!