Spring has Sprung!!

Can you believe that Spring has finally arrived? If you're from Minnesota, it hasn't come soon enough! And of course Winter had to go out with a blast. Just like last year. Same time and one last big hoorah for Winter's farewell.

So my question to all of you is how do you time your vehicle's maintenance (oil, coolant, tires, battery, A/C)?

A.) By the manufacturer's suggestions.

B.) By the season (Summer I do the A/C, Winter I do the coolant)

C.) Your own timetable that you keep track of.