Of course the effects seem repetitive. Corinda doesn't go into much detail on presentations.
The book was meant to teach you methods and you were meant to bring the presentations.
When looking at mentalism - it's all repetitive. Think, write, choose something - and I will tell you, figure out, or prove I know what it is.
It's the presentation of the effect that makes it something amazing. But if you must have a suggestion - read the chapters about swamis, billets, mnemonics, "predictions for the drawing room," mentalism with cards, and Patter and Presentation (Step 13).
If you can't find something in all of that - you're not looking hard enough