Question - How To Get Ready For Xhtml? 
          
        
        Answer - 
        
XHTML is not very different from HTML 4.01, so bringing your code up to the 4.01 standard is a good start. In addition, you should start NOW to write your HTML code in lowercase letters. 
The Most Important Differences:
-  XHTML elements must be properly nested
-  XHTML documents must be well-formed
-  Tag names must be in lowercase
-  All XHTML elements must be closed