Site-specific search is one of my favorites. To find information on a specific site, simply add “site:url” after your search term. For example, by looking up “active shooter site:d-ddaily.net” Google would only return results for active shooter on d-ddaily.net.
My next favorite search shortcut is to search for a file. Let’s say you wanted to find PDF files about shoplifting. Typing in “shoplifter filetype:pdf” will return PDFs (not regular web pages) with “shoplifting” in the title. You can also try “shoplifting filetype:docx” to do the same for Word documents.
This works for publicly available documents only and can be very useful in doing research.