A selection of tools and resources that I've found useful.

Compiler Explorer

Online compiler providing the assembly output of programming languages.

uops.info

Latency, throughput, and port usage data for x86 architecture instructions.

Naming Schemes

There are 2 hard problems in computer science: cache invalidation, naming things, and off-by-1 errors.

fzf

A command-line fuzzy finder. Very useful when combined with other tools like fd.