Trade Off

We all want to have the great life.
Health, wealth, love and happiness.

But not many of us understand that, to get something we need to lose another.
This is trade off.

If we want to lose weight, we have trade it off with all the tasty/calorific foods.
If we want to have more income, we have to trade it off with easy spendings.
If we want to have a better love, we have to trade it off with selfish needs.
If we want to have be happy, we have to trade it off with short pleasures.

Just like Newton's third Law:

For every action, there is an equal and opposite reaction

So if I want to achieve "A" we need to trade it off with "B".
You fill in the blanks.