Have you ever thought of another way that you could increase your tips? It's all in the smooth driving. You don't want to accelerate or break in curves. Save that for straightaways. And then you know what? Go gently when you're driving. Look ahead, see the red lights change. Just go ahead and take your foot off the gas and slow down. Your passengers are going to feel the difference too. The goal is while you're driving to keep them calm and comfortable and not even moving. If they experience high G-forces, your tips are going to go down.