Guest blogging is a two-way street. In addition to posting content to other blogs, invite people in your niche to blog on your own site. They’re likely to share and link to their guest article, which could bring new readers to your site. Just be sure that you only post high-quality, original content without spammy links, because Google is cracking way down on low-quality guest blogging.
The products and services you will be promoting to your audience must be relevant and good quality. Make sure you believe in them and know everything about them, because this will be crucial to you delivering the sales pitch to your audience. You need to build trust with your audience so make sure the products and services you choose to promote are trustworthy enough.