Patterns

Another way to have them available is by using CC libraries.

Pattern swatches are not supported in CC libraries (and neither are global colors, gradients and brushes).

But as a workaround you can drag an object using a brush/pattern/gradient/spot or global color to the CC Library 

You can also drag multiple items using different brushes/patterns/gradients/global colors together into a CC library to simulate a library.

The easiest way to add them to a new document is to hold down the Alt key when you drag them from the library and place them in a new document. The patterns/gradients/global colors automatically get added to your swatches panel.

You can hit escape before you click to place the object(s) or delete the dragged library items because the swatches and brushes are now part of the document.