Fill your skin with snow, light a campfire, interact with your waterskin, heat near campfire, enjoy.
>Full armor is a must
>Seriously, you're gonna get fucked up
>No, I mean really fucked up, I've been skidding face first across the ground with an adventurer race using the steel hard dragon bones and scale tissue properties
>Mangled lung, guts, bruised and smashed open my arm, both legs, and my chest
>If I ended up hitting a hard enough wall not even steel bones would help
>So yeah, expect to get mangled or die
>Now with that out of the way...
Drop a minecart and interact with it, use push off and ride in a direction, then you can just use the regular pushing north/south/east/west.
They can corner pretty well but you gotta set it up because they can carry a lot of momentum.
Overjudge your turns, if you wanna be going south and you're going southwest, start feeding in east pushes, plus south if you're far away, or north if you're up close.
The opposite direction is the only way to slow down that doesn't potentially involve blowing apart on impact.
When the "on minecart (NW)" indicator changes, keep going past it some, you'll keep heading northeast for a bit even when the main push is indicated as northwest or whatever.
You can literally ignore rivers up to, say... 8~10 tiles wide at normal speeds. You CAN get across the big 30~40 tile wide rivers in a cart, but you're gonna be going fast enough to kersplode if you hit anything on the other side.
Trees are life and death: you hit a trunk, you're wasted unless you glitch through it, but you can grab hold of branches to dismount without bouncing off the cart face first, so keep your hands empty!
If you've got the hang of scooting around decently enough, put some more carts in your backpack, then when you come up on some enemies, if your reaction time is fast enough, you can drop a cart and input enough commands to get it going pretty fast before you move out of range!