Here are some winners for switchign between windows and tabs. Some of these are super obvious, but there are some little gems here
- Toggling between open programs is Command + Tab
- Toggling up a minimized program is Command + Tab with Option on release
- Toggling between tabs is Command + Shift + [ or ]
- Opening a new tab is Command + t
- Closing a tab or window is Command + w
- Toggling windows of the same application is Command + `
From: http://mac.tutsplus.com/tutorials/os-x/how-to-toggle-within-and-between-apps-in-os-x