The Field list report is a useful check on the content types you created for your site.
Navigate to Manage | Reports | Field list.
In the first tab, Entities (shown in the preceding screenshot), you can see all of the fields that have been defined for your entity types so far and which entities are using each field (in the case where a field is shared).
The second tab, Used in views, shows a list of fields that have been used in views that are defined on your site.
Clicking the link on the view name takes you directly to the edit screen for the view.