A dictionary of Confusable Phrases: More Than 10,000 Idioms and Collocations

get a fix of something • get a fix on something
get a fix of something —(coll.) obtain a dose of smth., espe-
cially an addictive drug: Politicians up for re-election are like
crack addicts; they’ll say anything to anyone to get a fix of
votes.
get a fix on something —(coll.) obtain a clear understanding
of smth.: Because of lax reporting requirements it’s difficult
to get a fix on precisely what these companies own.
get a foot in • put a foot in
get a foot in —start working at a low level in the hope of
getting a better position in the future: Baker was soon playing
bit parts on the stage, got a foot in at the National Theatre,
and then the big break came. Cf.: get a foot on the housing lad-
der — manage to buy one’s first house so that one can buy a better
second house later: Soldiers are to be offered interest-free Gov-
ernment loans to help them get a foot on the housing ladder.
put a foot in —interfere in smth.: Whatever happens to me,
I won’t have this fellow Getliffe putting a foot in.
Note: 
The expression does not correlate in meaning with the
phrase put the boot in—(coll.) 
1
. kick a person in a brutal man-
ner: With that lot it’s not too bad as long as you stay on your
feet. If they get you down they put the boot in. 2. take unfair
advantage of smb., especially when the person is already defeated:
They rough him up when he gives evidence, and then, while
the bruising is still fresh, they put the boot in by issuing a
critical report.
get a good bang for one’s buck • get a good run
for one’s money
get a good bang for one’s buck —(coll.) get a good value for
one’s money (also: have a good bang for one’s buck): I am a stu-
dent who does not make much money and I really got a good
bang for my buck here.
get a good run for one’s money —(also: have a good run for
one’s money)
1
. face a strong challenge or competition from a
person: If matched competitively Steven would get a good run
for his money. Chuck would give him a good fight. He may
be short, but he is agile and a fast mover. 2. derive much sat-
isfaction in return for one’s outlay or efforts: I was not on the
ballot paper but there was serious interest in my attempt….
I got a good run for my money nonetheless.