Use google test site
I fixed most of it by installing the plugin “Autoptimize”
Optimize HTML Code
Optimize JavaScript Code
Optimize CSS Code
Also aggregate inline CSS
Inline all CSS
Remove emojis
Remove query strings from static resources
Combine and load (Google) fonts asynchronously with webfont.js
Another was to do this:
convert puzzle.jpg -sampling-factor 4:2:0 -strip -quality 85 -interlace JPEG \
-colorspace sRGB puzzle.jpg.new
mv puzzle.jpg puzzle.jpg.old
mv puzzle.jpg.new puzzle.jpg
Got to 89/95 scores!