Equip at least one sponsor before the race. This is a great way to obtain that all-important edge.
Each track in Asphalt 7: Heat features multiple shortcuts/different paths that'll help you get the jump on other racers while grabbing more power-ups and cash, and/or giving you a whole new area to explore. If you see a ramp, take it.
Drive through carefully placed icons around the track to pick up additional cash, nitrous energy or a welcome speed boost.
Use nitro while barreling down straightaways, and not after hitting something or steering your way around long turns. The same goes for activating Adrenaline mode.
Spend some monney and put a little something extra under your hood. There are 6 upgrades: Top Speed, Acceleration, Nitrous, Nitro Efficiency, Handling and Armor.