1. Know what type of power-steering fluid is needed for your car. Some power-steering pumps can use automatic transmission fluid, others have specific power-steering fluid for each car i.e. Honda requires and suggests that you use Honda's brand power-steering fluid (see owner's manual). Make sure you know, or the warranty from the dealership or from the parts store may be voided.
2. Before attaching the power-steering belt, fill pump with required amount and type of fluid, (see owner's manual) and turn the pulley wheel by hand a few times. This helps cut down on dry turns before they can happen. If more power-steering fluid is needed fill accordingly.
3. Attach the power-steering belt with proper amount of tension (see owner's manual).
4. Turn vehicle on and proceed to turn the steering-wheel all-the-way right and left 3-4 times.
5. Turn the vehicle off and examine that the belt tension is acceptable, and again check the level of fluid and fill accordingly.
6. Always, always check your owner's manual before performing any maintenance on your vehicle. An educated car owner is a safe car owner!