Stop buying cars on a gut feeling and start using data to inform you what to buy. For example, you might have a love affair with Nissan Altimas, but the reality is it takes you 90 days to sell them and you only make $600 after you count the good (Winners), the bad (Mediocre Deals), and the ugly (Losers).
Every dealership experiences winners and losers but the idea is to stop buying slower moving less profitable units and start buying faster selling more profitable units. Using data to acquire inventory instead of gut feelings will give you more winners and less losers. This will ultimately generate more profit.