How do you apply foundation so it stays on?

Could you please elaborate on your technique for applying foundation in a way that ensures it stays put throughout the day? Are there specific steps you follow, such as priming your skin beforehand or using a particular type of brush or sponge? Do you have any recommendations for foundation formulas that tend to be more long-lasting? Additionally, are there any common mistakes to avoid when applying foundation, and how can one ensure a seamless blend for a natural-looking finish?