Mac Hot Key

1. Whatever you type into the URL bar can be surrounded by www. & .com by pressing control + enter. 
2. If you accidentally closed a tab then simply press ⌘ + Shift + T to reopen the most recently closed tab.
3. ⌘ + backspace will delete the entire previous word and ⌘ + arrow keys will jump to the start of the previous word.
4. ⌘ + L highlights the url/address bar in Chrome.
5. ⌘ + shift + n opens up an incognito mode tab on chrome for private browsing. No cookies are stored.
6. ⌘ + SHIFT + R = Clear cache and then refresh page.
7. In VLC, if your audio loses sync with the video or subtitles, there is an easy way to fix this. Simply pressing J or K will move the audio forward or backward. Similarly, to sync the subtitles you can press H or G.
8. Lock screen: CMD+Ctrl+Q
9. Show dock: CMD+option+D