How do i improve my Hummingbird results

I have installed Hummingbird and Smush for this site and have optimized correctly as far as i can see but improvements can be made and i am not sure how to do them.

Remove render blocking resources - 85%
When i clicked "configure script deferring" the login form loads and i need to login to my site again. When i do, it is the WP dashboard. Why?
Same thing happens when i try to do that with minify CSS, enable GZIP compression, etc.
What is the problem here and how do i fix it?

If i click minification in the sidebar i get asked for the username and password, but it loads the minification page.
When i am there - i do not know what to do to minify?
Is there a tutorial?

I am very confused as to how to proceed.