There is a lot of know-how needed to work in design, but one of the most important things is visual culture. Feed yourself and your visual culture by looking at other people's work. When learning, try to replicate other people's style and understand how they do what they do, and the most important thing is why they do it like that.
By keeping yourself up to date visually on different projects, you'll find out that you'll visually learn some of the design patterns used, as well as color palettes, interface ideas, layouts, and typography. This is done by just looking at what other people are working on and getting a feel of it visually. You can find some inspiration and good references on flat design and layout later in this section. These are some good examples of execution of flat design that also showcase how to use the style in different ways. Pay attention to the white space, colors, and palettes used, as well as iconography, photography, and how these sites...