4. Link(s)...(plural, not our hero from Legend of Zelda)
Use url links to connect various material to other networks. Especially if they have images that will appear in your links. Never hurts to keep connecting all of your material together. Especially because not everything will connect together, you may sometimes need to create links in alternate networks. Do this intelligently, again, spread the wealth of information for your online portfolio. It may bring more people from one network into another. It may also introduce those people to that network for the first time. So use links plentifully. But always refer to item 5 on this list.