In the past month I have written over 1,000 lines of code every single week (not that this is anything new) but without realizing it I was spending a lot of time highlighting, deleting text, then removing the carriage return/line feed. This short-cut may not seem like much but it is a huge time-saver as you work to design your classes in a structured extensible way and it has speed up my editing by over 10%.
Keyboard:  CTRL + L (cut text); SHIFT + DEL(cut text and carriage return); CTRL + X(cut text and carriage return); CTRL + SHIFT + L (delete)
Command:  Edit.LineCut; Edit.Cut; Edit.Cut; Edit.LineDelete
Versions:  2008,2010