Navigation Search – Ctrl+/
Ctrl+/ is the hotkey to enter the D365 navigation search located at the top of the page (This used to be the magnifying glass to the right of the legal entity, but in a recent design change the box is not top-center).

The navigation search is helpful if you know the exact name of the form you are looking for. The search functionality here still has room for improvement, so when I’m uncertain about the exact name of the menu item I’m looking for, I tend to favor using browser search (Ctrl+F) to open the desired module and search for the desired menu item.
Navigation Search Power User Tip
The navigation search matches based on the initial letters of each word typed.
Instead of typing “project invoice proposals” to return the Project invoice proposals form, the value “pro inv pro” is sufficent to return the same result. Typing “p i pr” would be an even more efficient way to return this result.

With some experimenting, you should discover a series of truncated search phrases to use in combination with Ctrl+/ that will resolve to your commonly used forms. Your own personal hotkeys!