Turn off gif auto-loading.
Use @Everyone to notify everyone in a chat (versus channels).
Create a new chat to yourself as a pastebin.
Some bots can be @-mentioned personally, so you can try subcommands (like help docs) without pinging everyone in the channel.
When creating bullet lists, Shift-Enter can add to the current bullet. Nifty to paste a link, S-Enter, then include an explanation. Press Enter to start the next item.
Press ```<Space> to start a code snippet.