Painting is all about differences. Big against small, dark against light, bright against dull. Temperature in a painting is no different - using warm against cool. Having a dominant temperature in your painting helps the viewer understand it, making it read faster and better. I see many paintings that are indecipherable as to which temperature is dominant. Most end up with a 50/50 split of warm and cool. Pick one! Predominantly warm or predominantly cool! Then throw in a bit of the opposite temperature and watch your colours sing.
Tip: The brighter the complimentary colour, the smaller the space it should occupy. The duller the compliment the larger it can be used. The more electric the colour, the smaller is has to be to not dominate in the painting. In this Tom Thompson painting "Autumn Garland" the temperature is predominantly warm with about 30% cool colour to offset the warm. Notice how the cool blues dance next to the warm reds and yellows? In this Robert Genn painting "Jasper Lake" the temperature is predominantly cool with a warm sky and some luscious eye popper reds in the foreground. Following my aforementioned tip, the warm orange in the sky can be a bit larger because he has grayed the chroma down.