2013 was an exciting year for UX/UI design with one of the key changes being a marked move from skeumorphic to flat design. However, beware of thinking this approach is merely a move towards a minimalist style. The real point behind this change is that it is a shift of focus onto content and functionality, while doing away with superfluous elements. It is important to note that it is not merely about removing as many elements as possible in an attempt to reduce clutter. It is about deciding what to remove in order to make the product easier to understand while still maintaining a clear hierarchy of elements.
Clipping is a handy way to collect important slides you want to go back to later.