Although I use the Mac shortcuts
here, you can convert these easily to Windows: usually when Macs use the
Cmd (Apple) key, Windows uses the Ctrl key.
To toggle the case of a selected word or
phrase: Shift+F3
To quickly apply Heading 1, 2 and 3 styles: Cmd+Opt+1, Cmd+Opt+2,
and Cmd+Opt+3
When you have just reopened a document, pressing Shift+F5 will
take you back to the last place your cursor was at before you closed the
document (be careful that you don't do anything between opening the doc and
pressing
Shift+F5 though!)