Use an aggressive second serve as your first serve.
By hitting aggressive second serves as first serves constantly, players will naturally improve the consistency and effectiveness of their second serve. They will also relieve some of the anxiety that comes when hitting second serves.
A consistent and well placed first serve is extremely effective. This will keep opponents guessing, leading to weaker returns, and help players establish dominance early in the rally. These advantages will help players understand the importance of placement and having high first serve percentages.