1. Change in Speed: This is the most straightforward way. If you increase your speed, your velocity increases. If you decrease your speed, your velocity decreases.

2. Change in Direction: Even if you maintain the same speed, changing your direction will change your velocity. This is because velocity is a vector quantity, meaning it has both magnitude (speed) and direction.

3. Change in Both Speed and Direction: The most common scenario is changing both speed and direction. For example, a car accelerating around a curve is changing both its speed and direction, resulting in a changing velocity.