I've learnt the following in terms of integration;

* What are integrals, and what do they represent?
* Indefinite integrals as the opposite of derivatives
* Using the power rule for derivatives to provide the power rule for integration
* Integral as infinite sum
* Area under curve, and area between two curves
* Volume of solid of revolution
* Integration by substitution
* Integration by parts
* Integration by partial fraction expansion
* Improper integrals

I'm wondering where to go from here. I know the basics of numerical methods, and the fundamental theorem as well. I'm looking to go further in terms of analytical integration, but I don't know which topic would be next. Any ideas?

EDIT: I've checked the syllabus for AB/AP calculus, but it only lists very vague ideas of the concepts, and not sub-topics.