bring sand to the beach
To do or undertake something redundant, pointless, or futile, usually in the context of bringing something to a location where it is abundant or unnecessary. The company always caters lunch for these meetings, so I don't know why you bring in your own sandwich. You might as well bring sand to the beach!
like a beached whale
1. Completely stuck and unable to move or escape from the situation. Said especially of large objects or vehicles. Our van's wheels sunk in the mud, and we've been stuck here like a beached whale for over an hour!
2. potentially offensive Of a person, exceptionally large or obese. I love going to the beach, but I'm going to look like a beached whale in this swimsuit.
a beached whale
potentially offensive An extremely large or obese person. I really need to start exercising again. I've turned into a beached whale!
there are plenty more pebbles on the beach
There are many other excellent or more suitable people, things, opportunities, or possibilities in the world that one may find. Said especially if someone has recently been through something or some romantic relationship that has failed or turned out badly. I know you are broken up about Janet leaving you, but there are plenty more pebbles on the beach. I'm pretty disappointed that I didn't get the job, but I'm trying to remind myself that there are plenty more pebbles on the beach.
there are plenty of (other) pebbles on the beach
There are many other excellent or more suitable people, things, opportunities, or possibilities in the world that one may find. Said especially if someone has recently been through something or some romantic relationship that has failed or turned out badly. I know you are broken up about Janet leaving you, but there are plenty of pebbles on the beach. I'm pretty disappointed that I didn't get the job, but I'm trying to remind myself that there are plenty of other pebbles on the beach.
there are other pebbles on the beach
There are many other excellent or more suitable people, things, opportunities, or possibilities in the world that one may find. Said especially if someone has recently been through something or some romantic relationship that has failed or turned out badly. I know you are broken up about Janet leaving you, but there are other pebbles on the beach. I'm pretty disappointed that I didn't get the job, but I'm trying to remind myself that there are other pebbles on the beach.