My favorites are:
1) Rename - It works on method names, variable names, class names, fields-- really anything with a name.
2) Convert Anonymous Class to Nested - Helps with debugging, lets you reuse logic (such as a comparator) that you only thought that you'd use in one place.
3) Convert Member Type to Top Level - Frequently after making an anonymous class into a nested class I discover that the class is useful elsewhere. This refactoring is perfect then.
