Look Ahead, Not Down: Don't focus on your sled; look at the top of the screen. Anticipating an obstacle two seconds before you reach it is the only way to survive high-speed sections.
Master the Short Jump: Not every obstacle requires a massive leap. Sometimes a short, timed jump is better for maintaining your momentum and staying in control. snowrider
Unlock Better Sleds: Visit the in-game shop often. Some sleds have better handling and faster flip rotations, which can be the difference between a "Game Over" and a new personal best.