When I first started out, I asked that question a lot. I just wanted someone to say, look do this this and this, then this this and this - a bit like a step-by-step, but one that would work. I didn't find one, but did get to speak to lots of prominent Rails folk and took on-board their advice... and promised myself I would do such a guide for anyone else serious about learning Ruby and Rails.
So here it is: Best way to learn Rails I hope you enjoy it as much as I did!
(I'm not sure if it still is, but it used to be returned with the !Learn factoid in the official Rails chat room - just adding that in case you're wondering whether it's a good guide to follow or not)
Please feel free to add your own tips on learning Rails