Sick of navigating to the Dock or Launchpad to open another application? Try this shortcut;
Press the Command + Spacebar keys and the Spotlight search box will open. Start typing the name of the application you want to open and Spotlight will give you a list to choose from with the closest match at the top. When the application you want to open is highlighted in blue, press Enter and it will open!
PS: this also works for searching for files on your Mac.