How Can I Create a Document Just for Myself?

Create a Hidden document to keep it private. Later, you can change the visibility to include other people if you need to.

Note: Externally-facing communities (those serving customers, partners, and vendors), do not have this feature.

You can create documents that are visible only to you. To do this, click Pencil icon > Document (or Uploaded Document. When you finish, click Hidden in the visibility options before you publish or save as a draft to ensure no one else can see it. To see your Hidden document later, go to Content > Authored in the main navigation menu and then filter by Documents. From there, you can edit your document and keep it hidden, or you could make it visible to other users by changing the visibility options before you publish the document.

To understand which content types can be hidden, limited to specific people, or public, see Content Visibility Options

You can also keep bookmarks private if you don't want others to see them. In addition, if you assign yourself a personal task, no one else can see the task.