The followings are awesome blogs or books I've read. I deem that they will be worth your time. Have a try!
- Architecture
- Architecture In Action
- Coding
- Concurrency
- Databases
- Distributed Systems
- Infrastructure
- Java
- Linux
- Message Queues: Message queues are so important, and they deserve their own category.
- Network
- Web
- Misc: Actually, it's not misc, there are lots of things here.