Emacs shortcuts

Select Multiple lines, cut and paste:
ctrl + space --> to mark the starting point
ctrl + w --> to cut
ctrl + y --> to paste selection

String Replacement:
Esc, Shift %
Enter new text to replace press return
Enter new replacement text press return
Press ENTER to cancel
Press . (dot) to raplace the first occurrence
Press ! to replace all selected text

Comment out multiple lines

ctrl + space --> to mark the starting point, then make your selection with up/down arrows
Esc ; 
enter

#To uncomment
Esc ;
Enter

Delete trailing ^M

Esc-x delete-trailing-whitespace

Search a region

C-x n n
C-s itemtosearch
C-x n w

Replace Commas with Return or empty space

Ctrl x replace-string
Enter
,
Enter
Ctlr-j
Enter

Go to the beginning of a word

Esc-m

Convert all letters to upper case

Esc-x
uppercase-region
Enter