The most famous secret is "GodMode," a hidden folder that centralizes nearly every control panel setting into a single list.
Libraries were Windows 7’s "best kept secret" for file organization. Instead of moving files, you can "include" multiple folders from different drives into one Library (like "Projects" or "Work") so they appear in one unified view without actually changing their location on your disk. Make the most of Windows 7's Libraries - AskWoody
: Maximize or minimize/restore windows instantly.