Step 1) Go to http://pinterest.com/.
Step 2) In the Pinterest homepage, you will see two options – you can either Sign up with Facebook or Sign up with email. When you choose the Sign up with Facebook option, your Pinterest account will be connected first to your Facebook account and after that, you will continue with the same Sign Up process.
Step 3) Fill out the Sign Up form completely, and click on the Sign Up button.
Step 4) You will be asked to follow 5 boards. To do this, you need to choose the category first, then after that choose which of the boards you want to follow.
Step 5) You will be given a quick tour of Pinterest. Click on Take tour and follow the on-screen instructions.
Step 6) Verify your account by confirming your email. Open your email account and click on the Confirmation button within the verification email sent to you.
Step 7) Your Pinterest account is now ready. You can go here: http://about.pinterest.com/basics/ to know how to use it and to check out the guidelines/rules about pinning.