Tail press on a mellow slope. The nose won't come up, however many times you try. It rises for an instant, then you're on your backside. Maybe the board's too stiff, you think, and go bend a softer one in the shop.
The cause is further back than that.
When a press won't work, most people are trying to lift the nose. Pulling the arms back, hauling up on the front foot. It rises sometimes, but it drops straight away. It never lasts.
Don't lift it — move onto your back foot. That's the only change.
The board tips the moment your weight sits directly over that back foot. It's a lever: load the fulcrum and the far end comes up by itself. The lifting motion isn't needed. Worse, lifting with your arms or upper body sends your center of mass off the board, and that's the backside landing.
I spent a long time doing exactly this. Dozens of runs down the edge of a mellow slope, the nose up for an instant and then straight onto my backside. I'd decided the problem was leg strength, so I kept drilling the front-foot lift.
What changed it was giving up on the arms. I just moved my body over the back foot, and the nose came up without any effort at all. All those runs, and it turned out to be about where I was standing. It felt almost anticlimactic.
One more thing that helps more than you'd expect: speed.
People go slow because it's frightening, but too slow and the board never settles. It's like riding a bike at walking pace — you wobble. A little quicker than the edge of stalling is about right.
【How long you hold it can wait】
Chase a long press from day one and your attention goes to enduring it rather than building the position.
One second is fine. Get to the right spot, then set it down quietly. Repeating that gets you to a long press sooner than grinding does. A few centimeters of air under the nose still counts, as long as you're standing in the right place.
A press is unglamorous, and nobody films you for one. But it's the trick that teaches you what happens when you stand in different places on your board, and everything after it gets easier once you know that.