Here's mine:

    alias g="git"
    __git_complete g _git # enable git autocompletion (braches, etc.)
    alias gc="git commit -am"
    alias gp="git push"
    __git_complete gp _git_checkout # checkout is more useful than _git_push because it autocompletes the branch
    alias ga="git add -A"
    alias gd="git diff"
    alias gb="git branch"
    alias gx="git checkout"
    __git_complete gx _git_checkout
    alias gs="git status"
    alias gl="git log"

I have a ton of aliases but I have them all proceeded by an underscore. That way, I don't muck up native commands.

alias _up='sudo apt update -y && sudo apt upgrade -y'

Nice, I have those same aliases.

Also not afraid to add multi-letter aliases if I find myself typing the same multi-word command over and over.

For example git diff master HEAD becomes gdmh

alias g=git

And then define one and two letter aliases for the things you do often:

st=status

l=log --with-prettiness

ap=add --patch

shit=reset

co=checkout