If you want to learn to write, you must read. That's pretty much it. Sure, there are thousands of tips to be had but, to be honest, many of those you learn on the way. The most important part is to keep yourself reading and therefore in contact with what you want to do.
Though here's a small tip: When writing, strive to find your own voice rather than following somebody else's style.
And since I don't want to disappoint you, I will admit that I did find this very useful many years ago when I was starting to write (And I should actually read it again soon :P): http://hollylisle.com/how-to-start-a-novel
Not just that how-to, but all of them. That author also wrote a free ebook called Mugging the Muse: Writing Fiction for Love AND Money, which is sadly no longer on her website though it seems to be on other places and I have a copy of it on my PC still. If you want it, send me a PM and I'll upload it for you. It was (and still is meant to be) free, so it isn't really illegal :)