You should have gotten an email which has your account information (including a password). Your username is whatever email address you typed in at checkout... if you used PayPal, it will be your PayPal email address.
The first thing that you need to do is visit your Member's Page at https://howtofightnow.com/members ... this is where you can login and access your stuff.
Bookmark This Page... it will make life much more convenient for you.
All of your content can be accessed in your member's area, or by using the "Paid Programs" menu (which is on every page on the site). All of your stuff, including links to Reset your Password are in your member's area... so it's a good place to be... I guess.