“Come up to scratch” began as a boxing term about stepping to a line. Now it means meeting the expected standard.

Possible means it can happen or exist. Feasible means it can realistically be done with the resources, time, or conditions you have.

“Get your ducks in a row” means to get organized before acting. Here is the likely image behind it and how to use it naturally.

“Have skin in the game” means having a real stake in an outcome. Here is where the expression comes from and how people use it today.