Whether you want to admit it or not, the decisions that you make as a developer greatly influence the final design of your application's user interface. It doesn't matter if you're working with a designer, or you're a one-man A-Team, there are some very easy and powerful things that you can do to ensure that the final product is intuitive, usable and (gasp!) beautiful. Come embrace that designer inside of you that wants to get out (and wear hipster glasses).