DZone/Javalobby has over the past few months published several Refcardz which provide tips and tricks at your finger tips. I myself have been using many of these for the past several months. These Refcardz are written by industry experts, who in many cases are authors of best selling books. If you print these PDF versions, they look just great in your office as well.

Some of the cheat sheets I have found very useful are:

1. Getting Started with Eclipse includes :

• Getting Eclipse
• Workbench 101
• Development with Eclipse
• Keyboard Shortcuts
• Plug-ins
• Community Web Sites
• Hot Tips and more…

2. Spring Configuration topics covered:

• XML elements available as of Spring 2.5
• Most commonly used elements
• Namespaces
• Guide to Spring’s rich set of annotations

3. Dependency Injection in EJB3 includes:

• What is EJB3?
• Resource Injection
• Injection of EJB References
• Injecting JPA Resources
• Injecting Spring Beans in EJB 3
• Hot Tips and more…

4. Design Patterns covers the following:

• Chain of Responsibility
• Command
• Interpreter
• Iterator
• Mediator
• Observer
• Template Method and more..

5. IntelliJ IDEA includes:

• About IntelliJ IDEA
• Getting Yourself Oriented
• Finding What You Need
• Running and Debugging Your Project
• Write Less Code
• Hot Tips and more…

6. GlassFish Application Server covers the following topics:

• About GlassFish
• Installing GlassFish
• GlassFish Domains Profile
• Common Administration Tasks
• Clustering and Load Balancing
• Hot Tips and more…

There are many more available at the following site:

7. RefCardz at DZone

P.S: Before you can download any of these free PDF versions, you need to fill out a registration form; the form is really short.

Here is a sneak peek at Eclipse cheatsheet: