Workshop by parents of a son and/or daughter on marriage is a must.
Parents should enlist and explain in details the Do's and Dont's for success of married life.
Just having good look, good qualification and good earning does not make a marriage successful. These things can only work as a base for agreeing to marry.
Inter-personnel manners, care for each-other and maintaining dignity of relations makes the most important issues.
Or failure is certain!!!