Don't think of your online work as separate entities -- a blog, a Flickr account, Squidoo lenses, etc. Instead, think of each piece of content you create as part of a large web -- your empire. The way you web those pieces together is through interlinking.
For every post or article I write, I am always thinking in the back of my mind about other relevant articles that I can link to. In the words of my blogging friend Barb, "I am my own best referral system." Make that happen with deliberate interlinking.
Use specific anchor text for every link.
I always use specific (keyword) text for my links.
||generic anchor text
||to find out more about science notebooking, click here.
||specific anchor text
||to find out more, visit Science Notebooking.
Use links to add value to your content.
Obviously, you don't want random links just for the sake of linking. Links are most powerful when they are linking to other sites similar in content. I normally write my text and then read over it, looking for words that my reader may not understand or that I've explained more fully elsewhere. Those are the things I link to.
Too many links overwhelms the reader. Even if they don't click on a link, the visual impact of so many links slows reading. Each link causes a split-second, silent question, "Do I click or not?" Don't hamper your reader with too much of a good thing.
Link Lists and Sneeze Pages
Besides naturally interlinking your online work, two other powerful strategies are link list posts and sneeze pages.
Link list posts are blog posts that are basically just a list of links. These are most effective when the title mentions a number, for example Ten Ideas for Summertime Projects. Write a brief introduction to your list as well as a short blurb for each link in your list. These are a great way to showcase your work on a single theme that spans various publishing platforms.
Sneeze pages are resource pages on your blog that link to lots of content that may otherwise be hidden deep within your archives. Make the sneeze page itself have valuable content rather than just being a list of links.
Read Katinka's Marketing Spiritual Blog
I love all of her blog, but the post 20 tips on how to interlink your online properties is especially relevant. She gets far more technical that I have been here. Read the article a couple of times until you can understand it. Revisit it occasionally to make sure you are internalizing the principles.
If you use Etsy, be sure to read How to Build an Online Empire Starting with Etsy. I don't sell at Etsy, but the principles are the same for any site.