Like learning how to program, I think it's a mistake to look at a finished product, go "I want my project to look like that!" and then try to deconstruct the end result systematically.

I'd suggest forgetting the "oh pretty!" aspect of design, and just focus on simplicity, both on aesthetics (What's simpler than a line to separate? White space!) and usability (Simpler than two clicks: one click). The basic principles of fonts, spacing, and color theory always apply, so start with getting comfortable with these techniques. The gradients, subtle shading, and translucency effects can come later and build on top of the basics anyway.