For the most part Internet Marketers say that your best course of action is to become an expert within your niche. This is almost always followed up with some form of the "fake it til you make it" cliched advice. So then you have to decide what you want to do.
Rather than telling people to fake it, shouldn't you figure out what it is that you can do to help yourself become a genuine expert? You can also learn what to do to position yourself this way but you have to prove to your audience that you have more than just a basic clue about things.
If you want people to see you as an expert first they are going to need to see you. Social media is one of the best ways to make this happen correctly. The niche you choose is going to tell you which one you should be focusing on. If you're serving a more professional audience, you should start with LinkedIn. Facebook and Twitter are also important parts of any social media strategy. Selling your image and brand are your only goals here.
So don't try to market any products just yet. You will need to network with people and engage them as much as possible. This simple thing is enough to expose you to others and help them remember you.
If you are not an expert in your niche but want to develop that perception, then it will take more time to accomplish this branding. So you have to be patient with the process, and you also have to give your self time to learn. Very many small business online marketers want everything to be instant. And don't think that quality and honesty in your business does not matter because it's more important than ever. You must take your time and create a road map that will give you solid direction and goals to accomplish. After all is ready to go, then assign priorities to goals and set out to meet them one at a time.
It shouldn't take long for you to see that people who are actually experts and who are good at marketing themselves almost always have the best quality products. Obviously this doesn't mean very short ebooks with prices that are far too low. Typically experts will have much more extensive courses and products that have the right prices. Don't price everything so high that your audience can't afford it but don't be afraid to play the part either. Experts understand their status and don't underestimate themselves. Experts understand that their information is valuable and it should be priced accordingly. If you have worked with branding before then it will be simpler for you to create your brand as a niche expert. Backing up your claims is quite important here. So there is a lot of work sitting there for you to do. But being known as an expert in a niche makes the effort more than worthy.