How can I improve this Mailing Address SQL Server SELECT Statement?

Question

How can I format a Mailing Address so that I always push all non-null rows to the top? That is, I want to convert an address from the structure below to a mailing address.<

Answer 1

SELECT 
    LTRIM(RTRIM(LINE1)) + LTRIM(RTRIM(LINE2)) + LTRIM(RTRIM(LINE3)) AS MailAddress1,
    LTRIM(RTRIM(CITY)) + ' ' + LTRIM(RTRIM(STATE)) + ' ' + LTRIM(RTRIM(POSTALCODE)) AS MailAddress2
FROM MyTable