Just focus on two key things.
1. Understand the purpose of your page and try to do the least possible. Ex: explain what the product does or create hype, ease of sign up or show benefits of product etc. 2. Reduce the noise on the page so you can accomplish it well. Do this by either increasing contrast for the interface elements or reducing the number of elements.
Too often people get caught up in making it pretty. So their priorities end up looking like:
1. Lets make it pretty 2. Tell them everything about our product
And so for a lot of developers doing design they fail at the first step and ultimately end up with a poorly designed page that is crammed with info.
Take some pointers from these guys and when in doubt "show less".