I am using Evernote mainly for data organization for a book that I am writing. There are several hundred notes (and growing) located in about a dozen different notebooks. I have over 100 tags that I use to make the notes searchable by different criteria. Evernote works great in this context. The problem is then using Evernote for personal use as well. Is there any way, using a single account, to completely segregate two completely separate types of information? I used to use OneNote and this was easily done my creating separate notebooks that you could switch between. ("Notebook" has completely different meanings in OneNote and Evernote. In OneNote, a notebook is a completely separate data file.) For example, in OneNote, I could create separate notebooks for business, school, and home notes and could easily switch between them which kept things like tags and types of information separate from each other. There does not seem to be any analogue in Evernote for this functionality. With hundreds of notes and, my main concern, hundreds of tags specific my book information, adding my personal notes into my current Evernote account seems to have the potential for a total mess of organization. Not to mention that searching across all notes would make it difficult to find since there will be book and personal information intermingled. Is there any way to completely segregate different sets of information with a single Evernote account. I have a premium account, but if I can't do this, I may have to go back to OneNote.