How can I create a good presentation for an effect?

Hey everyone! I've only been into magic for a couple of months, so I'm a total newbie. But every time I perform an effect, I'm more convinced that the spectator's reaction doesn't depend on how complex the effect is or how many hours you've spent practicing it, but rather on the presentation. Right now, I'm using presentations I find online, but I'd really like to be more original and create my own. So, that got me thinking... What elements should a good presentation have? What's the specific goal of an effect's presentation? What advice would you give me for creating new, original, and effective presentations, and improving the ones I already have? Do you know any expressions, concepts, or hook lines that work well? For example, I've noticed that referring to randomness and the infinite possibilities of a deck's card order is a pretty common concept.

Thanks a ton! I'm having a blast learning this art!!!