You can get quite a decent boost in GTMetrix, by adding this code to the end of
/skin/reboot/custom/prefetch.tpl
Code:
<link rel="preload" href="{$AltSkinDir}/fonts/fontawesome-webfont.woff2?v=4.7.0" as="font" type="font/woff2" crossorigin="anonymous">
You can remove the unsplash.com code if you want also.
It's been added to the template. Thanks to Paul.
Also, you can now
promote coupons to the homepage, plus add custom coupon text and icons.
Some good ideas here -
https://freddiechatt.com/playbook/