Make sure to use different web sites, different email addresses and, sometimes, even different names for profiles that have different purposes. Artists have stage names, writers have pen names, you can choose different nick names or “handles” to use accordingly.

In my case I have a web site and email address with my name. It is for very general purposes and serves as an anchor, a place online where people can find me over time and that never changes. Then I have this blog which exposes a specific view of who I am and what I am about. I also have other web sites for different professional activities.

There is no reason you should have just one web site. Actually the more advanced your online game becomes the more internet resources you are going to use.