You can make the terminal font much clearer by running

sudo dpkg-reconfigure console-setup

And you can run the following and make the font rendering on LCDs much clearer. I don’t think it’s a placebo.

dpkg-reconfigure fontconfig-config

I have been liking:

• Native font tuning
• Full font hinting
• Always have subpixel rendering
• No bitmapping

Powertop is a good tool (atleast on x86 machines).

apt install powertop
systemctl enable powertop && systemctl start powertop