Prepositional Idiomatic Phrases
about as by & for in on with
after at for into & of to  
against between from of to & toward  
on
on business
on a diet
(to be) on fire
(to be) on the phone
on the radio
on strike
on television
on time (punctual, not late)
on top of
on a trip
on vacation
concentrate on something
congratulate someone on (doing) something
(to) count on ...
decide on something
depend on someone / something
effect on ...
from now on
(to) frown on something
live on money / food
rely on someone / something
spend (money, time, etc.) on something (but we say: spend time doing something)