When stuck for ideas or looking up examples of different UI patterns, take a look at these sites to help you along the way:
Welie.com patterns in design
Great resource by Martijn van Welie, a fellow Dutchie.
A library with many patterns and useful screenshots to illustrate these patterns.
UI pattern factory
UI Pattern Factory is a mix of user interface design pattern library and
Yahoo! design patterns
The Yahoo! library of design patterns gives a great flavour of around 55 design patterns out there.
The book ‘Designing Interfaces’ is available online and provides some useful patterns and other things to think about when designing a website.