It's not rocket science
It's not complicated
Go back to the drawing board
Start over
Look before you leap
Take only calculated risks
We'll cross that bridge when we come to it
Let's not talk about that problem right now
The ball is in your court
It's your decision
A dime a dozen
Something very common
You can't judge a book by its cover
This person or thing may look bad, but it's good inside
Make a long story short
Tell something briefly
On the ball
Doing a good job
The best thing since sliced bread
A really good invention
A blessing in disguise
a good thing that seemed bad at first
Cut somebody some slack
Don't be so critical
Give someone the benefit of the doubt
Trust what someone says
A bird in the hand is worth two in the bush
What you have is worth more than what you might have later
Once in a blue moon
Rarely
Let the cat out of the bag
Give away a secret
Under the weather
Sick
Actions speak louder than words
Believe what people do and not what they say
It's raining cats and dogs
It's raining hard
A penny for your thoughts
Tell me what you're thinking
Saving for a rainy day
Saving money for later
Take a rain check
Postpone a plan
A picture is worth 1000 words
Better to show than tell
Hang in there
Don't give up
Spill the beans
Give away a secret
Miss the boat
It's too late
Better late than never
Better to arrive late than not to come at all
It's a piece of cake
It's easy