There are some good books out there... such as (slightly outdated) "Design for Hackers" and "the design of everyday things" ... But if I were going to recommen

There are some good books out there... such as (slightly outdated) "Design for Hackers" and "the design of everyday things" ... But if I were going to recommend a place to start I think you need to start small... begin by going to dribbble.com or awwwards.com and look around... get a sense for what you like, and more importantly, try to figure out why you like it. After you get an idea and take notes on the subject... try to fiddle around with copying the things that you like => personal blogs are amazing for this. As a developer you should understand many of the principles that will get you to a good design: reducing complexity, intensional organization, being of service to the user, iterating your way to better designs, getting feedback/ testing your work. Last tip: get some skin in the game. Charge someone for design work... nothing lights a fire under your ass like having your reputation on the line ;)