Whether you are cleaning up your Revit Project file or trying to find a view that you have just created. One of the Project Browsers Organisation settings can really help.
If you select the ‘Views (all)’ at the top of the Browser tree, and in the Properties ‘Type Selector’ select the option ‘not on sheets’.
This will change the Project Browser to only show the views that have not been placed on sheets yet. (Once you have finished, ensure that you change it back to show all views.)
(The first thing you should ensure is that you have this browser setting in your Project Browser! If not you will have to set one up!)
You can use this method to quickly access other Project Browser Options.