Most services in the maintenance schedule have recommendations in both time and miles. For example, brake fluid, transmission fluid, and coolant (radiator fluid) are all recommended to be changed every 30K miles or 2 years, whichever comes first (with brake fluid and transmission fluid recommended for 30K/60K/90K/etc, coolant for 45K/75K/105K).
Your dealer is giving you good advice. It is indeed important to change fluids based on time, if you don't reach the specified mileage interval. For example, over time, brake fluid absorbs moisture in the air, which lowers its boiling point and could make the brakes less effective in an emergency stop.
If you use your car on the racetrack, you may even want to change those fluids more frequently than specified in the schedule in the manual.
Originally Posted by 2001TypeR
are there any better fluids to use instead of stock fluids?
If you're using your car on the track, you might want to use a high-performance brake fluid with higher boiling points. Other than that, or if you aren't tracking your car, stock fluids are fine.
Originally Posted by 2001TypeR
For example, if i do radiator flush, there is a product from red line oil that you add to the radiator fluid that will help to better cool off the engine, is that any good?
You're referring to Water Wetter. Again, if you're not tracking your car, I wouldn't worry about it.
Originally Posted by 2001TypeR
are there other things on the car that i should service and change now?
I would suggest using the maintenance schedule in the manual as a starting point, unless you have reasons for doing otherwise. I don't have the schedule in front of me, but it normally specifies service intervals for other items too, including fuel filter, air filter, valve adjustment, etc.