A stone's throw

Example

This fancy apartment sits just a stone’s throw from the Élysée Palace

There are plenty of more fishes in the sea

Example

Don't worry about it, there are plenty more fish in the sea, you will have other opportunities

The grass is always greener on the other side of the fence

Example

I'm dark-haired but I would prefer being blond. The grass is always greener on the other side of the fence

To send up the river

Example

Have you heard about Henry? They sent him up the river for 3 years

To sell down the river

Example

Workers complained that the union sold them down the river in the latest contract negotiations

To bark up the wrong tree

Example

The police finally figured out that he was barking up the wrong tree, and started searching for a new suspect

Can't see the wood for the trees

Example

This report is so disorganized that I can't see the wood for the trees

Money doesn't grow on trees

Example

One way of educate their children is telling them that money does not grow on trees

The apple never falls far from the tree

Example

Elon Musk and his father may be estranged but the apple doesn't fall far from the tree

The sun peeks through

Example

As the sun peeked through the mountains this morning a new day began

Make the hay while the sunshine - strike while the iron is hot

Example

I guess you have still time but make the hay while the sunshine

To promise the moon

Example

It's hard to promise the moon when the sun is setting on Ohio's financial horizon

Bark at the moon

Example

When it will end to bark at the moon, it seems a Ozzy Osbourne's song