Something that hasn’t been touched on really, particularly in regards to disasters and tailslides, is tension in your shoulders. A back disaster, for example, revert early with just a bit more scoop than you would if you were turning around on flat, not quite as much as a back 180, but more than just a slide. When you scoop, you want to aim for smack in the middle of the board on coping and turn your shoulders hard in the opposite of the direction you’re scooping. Otherwise you’re going to over rotate. You can get away with it on mellow ramps since your wheels will catch on the transition, but it won’t scale up to steeper ramps.
The same holds true for tailslides. Little pop, scoop like you’re doing a lazy 180, and push against the coping with your back foot, but you gotta turn the shoulders to create tension or you’ll over rotate. If you come with speed and at enough of an angle, you should just be focusing on holding the body position and letting your momentum force the slide. The motions for tails, disasters, and lips, should all feel way more exaggerated and forceful than a smith grind or 5-0. In my experience, the best trick for picking up on the feeling of twisting opposite directions is a rock n roll. Backside rock n roll has the same hip/shoulder tension as a front tailslides, same with front rocks and back tails. The main difference is where you distribute your weight. Rock n rolls and board slides are all back foot. Tail slides your weight should be in the ramp more towards the front foot.
Smiths honestly aren’t even worth trying unless the ramp is steep enough to properly dip without catching the front wheels. It’s just a funky slash at that point. Mellow transition can breed a lot of bad habits that make it hard to scale your tricks up to taller and steeper transition. If all you have is mellow ramps, just fake it till you make and try to imagine you’re on a vert ramp. Lean in extra and exaggerate your posture. After all, most of them were invented on vert ramps.
For all these tricks, try to feel out the stall first too. It feels safer and will help you understand how the trick is meant to be held, as well as the feeling of re-entry. Then when you try to grind or slide you can approach more confidently.