The thing that has worked for me as a relatively inexperienced online marketer and designer, has been sharing the success I have had building my own personal brand.

It shows that I not only talk the talk, but also walk the walk. I have a hard time trusting people who are in SEO, Inbound marketing etc if they are not visible in search themselves or represent something online that makes me think they are capable of doing the things they tell me they can do.

Furthermore, when I first started out, I would build fake websites and just make up work to put into a portfolio. Sure the clients are fake, but the quality of work is not and that is what the buyer really wants. Honest insight into what you can actually do for them.

Hope this answer helps. Let me know if you would like to talk about it further.