Select with color channels
Sometimes, targeting a specific color channel can help create a much better selection, especially if there are distinct color differences you can take advantage of. In this example, the same diagonal move with the Quick Selection tool resulted in a much better selection of the heart when it was applied only to the Red channel in the Channels panel (Window>Channels).
Sounds like a good tip..but…shouldn’t there be said ‘example’ to demonstrate the tip? 😀