Put tabs in Tabhole and take them out where and when you need them.
A simple little extension that lets you move tabs between windows. Press the button to put the current tab in Tabhole, switch to the window you want it to go, and press again to take it out. You can move multiple tabs at a time if you multi-select them with Shift or Command. This extension is meant to replace the tab-dragging functionality that is unavailable when using multiple fullscreen windows in different spaces in OS X.