To get your ducks in a row means to organise your things well. It’s American English.
With the recession looming, the government has to get its ducks in a row and invest in job creation.
The company’s owner has given his managers a few days to get their ducks in a row. If they don’t improve their performance he’ll fire them.
If someone is described as a sitting duck it means they are vulnerable to criticism or attack.
The platoon ended up behind enemy lines. With no reinforcements from Central Command they were sitting ducks.