Simple, streamlined designs, consistent color schemes and a decluttered screen.
Those are all tenets by which a strong web developer designs and builds.
Of course, those elements mostly fall into the realm of a UI (user interface) programmer.
Meanwhile, issues dealing with functionality, site structure and accessibility are often the work of a separate UX (user experience) designer.
But these days, it pays to be a true jack of all trades.
You can learn the principles of both UI and UX development with the training in The Ultimate UX/UI Designer bundle, which you can pick up now from TNW Deals at over 90 percent off, just $29.