Today I was reading some blog entries from the Reddit blog.
This led me to read about RabbitMQ and some more about message queuing.
Then led me to read more about NoSQL. These slides present a balanced and comprehensive overview of the current state of free databases.
This led me to read about the graph database Neo4j.
All very interesting and thought provoking stuff. It makes you think about how you could reapply different solutions in new ways to existing code and solutions you currently have running... It also makes you think of new ideas.