hehe…
Before multi-select was an option with the Choice component, we used to use a method called Trebuchet to achieve basically the same thing.
As to other techniques, I guess you learn as you find a need. Sooner or later you’ll probably find yourself looking for a helper table.
And of course there is all sorts of funky stuff you can do with JSON & JavaScript 
@NoCodeAndy recently asked for examples of Community threads that might be considered useful. Two that would be at the top of my list are Fun with Dates and Reset Multiple Rows at once. That second one can now be achieved with Call API, but it’s still an incredibly useful trick to have in your Glide Toolbox.
In fact, any posts by @Jeff_Hager are worth a read. His Calculator Challenge is a great example of stretching the boundaries with Glide.
And of course, you can’t go wrong with any of @Robert_Petitto’s tutorials. That’s where I got most of my early learning with Glide. Bob’s Miracle Method is one you absolutely need to know about.