How good are you at entertaining business clients? Do you take them out for dinner and a show on your tab? You probably want to stop doing that second part, because the regulations have changed with the passage of the TCJA (Tax Cut and Jobs Act) and you can no longer deduct entertainment expenses.
You will want to keep a written log of meals and entertainment that you share with clients or businesses and just deduct 50% of the meals at the end of the year.