People will put more trust in what you have to say if you are well known in your field. The real skill that well-known authorities have is self-promotion. It’s a skill you should develop as well.
The more celebrated you are in your niche, the easier it will be to both get bloggers to allow you to submit guest blogs and convince readers to act on your product recommendations.
Think about the accomplishments you can point to in your past that will reinforce your image as an expert. Keep track of any awards or recognition that you have received so that you can use them to promote yourself. Don’t be bashful about promoting yourself as an expert at every opportunity.