How often should I blog?
A question I hear a lot is "How often should I blog?". The simplest way to answer this is as often as you can. It's really hard to overdo it.
That said, you want to make sure that you are posting valuable content. If you're posting about the same topics repeatedly, search engines are likely to pick up on the duplicate content and mark you down. Even if they don't, you don't want a visitor to see watered down content as their first impression of your business.
Content is critical for SEO, so if you have an SEO strategy, you do need to keep adding content. Three posts per week is great, but that doesn't mean you shouldn't do more. If you can't find the time, there are writers who can research and write posts for you. If you just can't write that many, that's not a huge problem either. Even just two blogs per month will add up over time.