Once In A Blue Moon

We see different parts of the Moon light up at different times of the month. This is because the Moon is at different positions in its orbit around Earth relative to the Sun.

• A full Moon is when the Moon, Earth and Sun are lined up. The sunlight shines on the whole l...

Meaning : to go back in time

Sentence : I wish I could wind back the clock and train harder for the match.

Create a list of what you want to change and place the easiest issues firstly. 

When you finish improving one aspect, only then you can start the next step. The first steps are important and when you'll see the results of your efforts, you will be inspired to go further.