What does “Hit the ground running” mean?

Start something and proceed at a fast pace with enthusiasm.

What does “Back to the drawing board” mean?

Start over because the current attempt has failed.

What does “Burn the midnight oil” mean?

Do something in the easiest or cheapest way, often neglecting quality.

What does “In the driver's seat” mean?

What does “keep your eye on the ball” mean?

What does “Put (something) on the map” mean?

What does “Birds of a feather” mean? 

People with the same interests will often be found together.

What does “Fish where the fish are” mean? 

Use right resources for the right target.

Use resources, such as time, where the highest results will be.

What does “Across the board” mean?