210's are very nose-heavy after landing, and require that you maintain more back pressure after touch-down than you're (probably)accustomed to using in the other airplane. Even if you know it's going to happen, it takes a few landings to condition yourself to hold the necessary amount of pressure to prevent the clunk when the nose wheel falls to the runway.
They also require significant nose-up trim on approach, and some operators simply hold the trim button after crossing the boundary on short final.
Bear in mind that a medium-loaded 210 will stall at 54 knots, so don't carry excess speed on final. 70 kias is plenty on final, and slower on short final.
Ditto, 182. They fly about the same. 210's just faster and will make an ugly scraping noise on the runway if you forget to put the gear down and refuse to do GUMPS checks on short-final.
Just keep slowly hauling back on that yoke until it's at the aft stop and keep it there after touchdown. It's gonna be heavy. Do some bicep curls.
Let the nose wheel come down on it's own.
Alight as softly as possible. The mains on the 210 and the owner will appreciate not having big gear bills at the next annual. They're all kinda "spindly".
If you have the runway, flying it on with a touch of power helps with the trim a bit. Work your way up to short-field landings, power-off. Most folks find the touch of power assists with pitch control in the flare. Especially when heavy.
Note the indicated airspeed that it lifts off at. Calibration error is pretty high, slow with the nose up. It will land nicely there at that speed too. Any slower, a high sink-rate will develop and you'll plop it on.
Read the POH as mentioned above and know why Cessna's checklist approach speeds are large ranges, especially if you fly it at wildly varying weights. The top end of those ranges will produce a long float. Slow her up to the bottom of the range if weight loading allows.
Piece o' cake! Nice travelling airplane if you got the gas and maintenance money.