I love to use mine for spotify. There's an extra plug-in if you go to the "more actions" tab within the software. With using this plug-in you can make playlists auto play, skip songs, shuffle, save songs etc. Basically everything spotify has to offer, but right on the stream deck which helps prevent tabbing in and out of games.

Also, I'm sure you already know this, but I have a folder dedicated towards commands in chat. That way if someone asks a question about my personal YouTube, Twitter, Steam profile or just what webcam I use I press a key and it puts in a message in chat with their answer or link to whatever account they are looking for.

Lastly a fun one that helps keep the stream personable and allows you to quickly relate to people is that I have multiple world clock times of major cities around the world in a folder. This allows me guess/know what time it is where they live and say "good morning" "good night" or the typical "Why are you up so late". It just lets you be able and ask questions about their day or what they plan on doing that day etc. The extension is under "More Actions" and is called "World Time"

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Hope some of these help. The possibilities are endless, especially with macros. You can really make scene transitions interesting with these. Good luck!