I have an email account that I signed up with. How do I sign in with what I have been using for months?
Yea, there is no way to log in to makeuseof, however, if you want to have a profile to keep track of your comments you can create an account on Disqus. Head to http://www.disqus.com and create an account, then you will be able to receive notifications of replies to your comments and keep track of what you post.
I don't think there is any account system on makeuseof.com currently.
You can use your email id to receive news letters or updates on the site direct to your mail inbox.
The subscribe box is on the right side, below the search box.
Subscribe to get daily updates on new cool websites and programs in your email for free
This is correct.
You only need to subscribe, or if you'd like to access a guide, you need to input your email address on the guide's page to access the download password.