to fall into place = if things fall into place in a situation, they happen in a satisfactory way, without problems

We’ve put lots of effort into this project, so I’m sure it will eventually fall into place.

to hear straight from the horse’s mouth = to receive information from someone who knows the facts

I either heard them from friends or straight from the horse’s mouth, which in this case was my father.

in the middle of nowhere = in a very remote place

I don’t want to spend summer in the middle of nowhere.

to recharge one’s batteries = to rest and relax for a period of time so that you feelenergetic again

I spent some days at home to recharge my batteries.

Every cloud has a silver lining. – There is something good even in an unpleasant situation.

Well, I was denied promotion this time. But every cloud has a silver lining: I won’t have to cope with a heavier workload. 

to yak = (informal, often disapproving) to talk continuously about things that are not very serious or important

People often ask me about my creations, but yaking about images is stupid and boring.

as stubborn as a mule = very stubborn

There’s no point persuading him to join us: he’s as stubborn as a mule.

it takes two to tango = if two people were involved in a bad situation, both must be responsible / the active cooperation of both parties is needed

You’re always saying it’s your wife who is destroying your relationship. But, you know, it takes two to tango.

to play a second fiddle to someone = to have a lower position than someone else does

I’m sick and tired of playing the second fiddle to my boss.

to look a gift horse in the mouth = to be ungrateful to someone who gives you something; to treat someone who gives you a gift badly; to ignore a suitable opportunity

Go and say “thank you” to your friend. You shouldn’t look a gift horse in the mouth.