How to write a Banking Application

I am rewriting my first blog as I haven't got any comment on that. Enjoy these points and share your own experience.

1. Store some of your configuration in properties files, some in XML files, some in the database, and some as static variables in your code.
2. Use reflection and dynamic proxies wherever possible. Where not possible, use byte code manipulation.
3. Never ever use assertions. Catch all exceptions and errors, and keep running. Don't ever send an error back to the user. Unless it's a NPE (Null Pointer Exception) . :)
4. Log either nothing or everything. When logging everything, include verbose output from all your third party libraries.
5. Always wrap your exceptions. Log the stacktrace from your wrapped exceptions only.
6. Loosely couple all your classes using XML configuration. When you realize that you need to somehow call those classes, provide instance accessors using public static variables.
7. Re-invent the wheel as often as possible. Write your own ORM. Your own remoting. Your own cacheing. Your own GUI framework. Your own testing framework. Your own widget toolkit. Your own scripting language. Write your own patterns or you can mix two or three patterns. Make up excuses and benchmarks to show why you needed to re-invent the wheel.
8. Make your code base as huge as possible. Include classes that were never used or tested. Use an abandoned experimental product to compile your classes. Make it impossible to compile in an IDE, and painful to compile from the command line.
9. Create many sophisticated disparate systems. Integrate by FTP. Using flat files with pipe delimited data.
10. User experience is not important. Create a slow, ugly GUI that uses a massive 2 gigs of RAM.