A list of resources that may be useful for you to learn more about Salesforce.
Online Learning
Trailhead
Trailhead is a must! even if you do just the admin modules, and leave the Dev modules for later, you will learn a heap about how Salesforce works. They have just updated it with two new modules and new quizzes. And if you like gamification of your learning, you will love it. https://developer.salesforce.com/trailhead
Note: Log in with your personal developer org? Don't have one? Get one now https://developer.salesforce.com/signup?d=70130000000td6N. This should be in your personal name and linked to your personal email address, and not linked to who you work for at the moment. This login will be with you through the course of your career with Salesforce. Use it for the Success Community http://success.salesforce.com, exams and certification, and even Dreamforce registration. Use it whenever you are dealing with your learning for yourself.
Learn Complete Salesforce
This is a Udemy Course https://www.udemy.com/salesforce-training/ They always have specials, I got access to the course for US$10. It seems to be quite comprehensive, and the presenter's accent will mean you need to listen closely to the videos, which is good, as you will learn something. See a YouTube video sample here https://www.youtube.com/watch?v=KJboB6H7Ado.
Blogs
There are so many new blogs out there at the moment dedicated to helping learn Salesforce from scratch. They are quite good.
Brent Downey
Rakesh Gupta
Supita Deb https://plus.google.com/+SudiptaDeb/posts
Depa Patel https://plus.google.com/+DeepaPatel/posts
This site
Books
Rakesh
Ebooks https://plus.google.com/115951122499934037629/posts
Success community e-book
Social
Success
Google +
Askforce
Stack Exchange