What interests you? Draw from that and apply it to your magic.
-Movies/TV Series
-Books
-Songs
-Some quote that resonated with you
-Scientific theories
-Psychology
-A memory or personal experience (always a classic, especially for tricks where you often just narrate what you're doing)
My go-to example for this my Daredevil presentation for a trick out of Royal Road to Card Magic.
I like comic books, and one of my favorite heroes is Daredevil. I was always fascinated that due to his blindness (and freak accident), his other senses were heightened to a remarkable ability. Notably his sense of touch, which is so sensitive he can read newsprint just by running his fingers over the paper. I use that to jump into the trick, where I have a card selected and placed off to the side, the rest of the deck shuffled and placed in my pocket where I can then reach in and match the selection.
I took a standard trick, an interest of mine, and put them in a room together to get to know each other until what I got was a presentation that has served me well. When something is interesting to you it shows in your performance and as a result, your audience will be more receptive and engaged in your magic.
My personal recommendations for your are Scripting Magic (both volumes but start with 1).
I have also heard that Stronger Magic and The Magic Way are both excellent but I haven't read them, yet.