Why hi ho everybody

anywho, straight to the point...
I've been doing my engish oral exams recently. My teacher puts forwards my 3 best grades as my final one. I had 3 Bs, and decided that I wanted an A average

I decided to do magic. I told a story bout a random kingdom and army e.t.c and did the trick where the spectator seperates all of the reds from blacks without knowing it (the last card trick in Street Magic by Paul Zenon) and he was amazed.
Now, I am hoping for any ideas of any more tricks that I could do. For example, an ungimmicked (as in, just 8 cards and sleight of hand) oil and water routine. I am wondering if anybody can tell me a decent place to find out how to do it a decent price. Any "help" with it is welcome as well once I have learnt the basics.
Also, any ideas of tricks I could do with patter is greatly appreciated. Any ideas?
Cheers for reading! Thanks in advance!