THEME:   the sound of a word in a phrase is changed by adding a Z yielding a different meaning   
GOOD ONES:     Really big hangover?   A DAZE LIKE NO OTHER   
Couch potato's preparations?    LAZE AWAY PLAN   
Caddies of old   EL DORADOS [I thought golf]   
Breads for Reubens   RUBLE [I thought ryes]   
9 to 5, eg.   RATIO [I thought jobs]   
Degree in math   NTH   
Commercial developers   AD MEN [
Mad Men should be coming back in a couple of months]   
Old Pisa dough   LIRE [the doughs are stale by now]   
Slaughter in the field   ENOS [he was an excellent baseball player]   
Better part of a loaf?   HALF [How can a half be 
better?   Because "half a loaf is better than none."]      
BTW:   I CALL EM AS I SEIZE EM is a clever theme entry but only English teachers use AS conjunctively --- everyone else uses LIKE.  (The rest of the expression is "An if I don't see em, I make em up.")      
RATING:    
 
 
Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun