ctrl-space:Magic...

ctrl-shift-r: Look for a file

ctrl-shift-t: type search for a java source file

alt-shift-w: sync the file in navigator

ctrl-shift-m: import java type for the high lighted type name

ctrl-shift-o:import java types

ctrl-shift-f4: Close all opened files

ctrl-h: search for files in the workspace

ctrl-f: Search/replace with in a file

f5: Refresh any object project/package/file