To be caught between a rock...
and a hard place. [Used to say that a person is caught between two difficult choices, for example ones which will make two parties angry at them]
Actions speak louder...
than words. [Used to say that it's more important to demonstrate your beliefs or morals with actions than to only pay lip service to them and do nothing]
If the cap fits...
wear it. [If a particular description fits you, accept it]
Great minds...
think alike.[When someone has had the same idea as you independently from you].
It takes two...
to tango. [When a task needs two people or two people should accept the blame or responsibility for something bad they took part in, like a quarrel]
Bite more...
than you/he/she/they can/could chew. [Committing to do something that you don’t really have the time, resources or ability to do]
A fool and his money...
are soon parted. [Said to convince people who are not wise with their money not to spend it on worthless things or a gullible one not to be scammed]
It's too late to whet the sword...
when the trumpet blows. [To mean that you should always prepare things in advance and not procrastinate or delay things until the last moment]
Speak of the devil...
and here he/she is. [You were just talking about someone and they appear as if summoned by your conversation]
It's always darkest...
before the dawn. [Used to console a person, meaning that although things may be going bad for them now, there's hope that good things are around the corner]
Getting a taste...
of your/his/her/their own medicine. [Being treated the same bad way that someone has been treating others]
Every cloud...
has its silver lining. [Even bad things have a positive side]
What goes around...
comes around. [It means that you should not treat others badly, or else you will be treated badly. Instant karma as they say nowadays]
The more things change...
the more they stay the same. [It looks like things are changing but actually nothing important has changed]
Easy come,...
easy go. [To say that something that was achieved easily and without effort is also lost as easily]
A man's meat...
is another man's poison. [Things a person may like may be distasteful for others and viceversa]
All's well...
that ends well. [It means that a person can forget about how unpleasant or difficult something was if everything ended in a good way]
Birds of a feather...
flock together. [People who are similar in personality, tastes or morals you disapprove of tend to get together or spend time with each other]
The grass is always greener...
on the other side [We tend to think (mistakenly) we are the only ones having problems and that others have easier, better lives than us]
Accidents will happen...
in the best regulated families [Not every accident can be prevented]
When in Rome,...
do as the Romans do. [When visiting a place or being in a particular setting, you should act like the rest or follow the customs so as not to stick out]
Don't count your chickens...
before they hatch. [Don't anticipate success too early before something is finished = Don't sell the bear's skin before you've caught it - Lorenzo Astenio]
The nail that sticks out...
gets hammered down. [Those who are different or stand out from the crowd, often get unfairly criticised or attacked]
All is fair...
in love and war. [When describing a situation in which people do not follow the usual rules of behaviour and do things normally considered unfair]
Out of the frying pan...
into the fire. [To say that someone has moved from a bad or difficult situation into an even worse one].
Easier said...
than done. [It may sound like a simple problem on paper, but in practice it's much more difficult than it appears at first sight]
All roads...
lead to Rome. [It means that all choices, methods, or actions eventually lead to the same result]