So let's talk about rocks. Potential spoilers!
When I am about to hit a rock for some iron, or potentially gold, I make sure I have nothing around the rock at all. No already spawned stones, or if I've dropped anything anywhere or placed something too close to it, so it has 8 clear spaces all around it. Because....
...am I right in thinking that, if you hit a rock 8 times clean, there is more chance of gold on the final 1/2 hits? Or, if it's a money rock, more chance of a bag of bells, rather than just bells? And when I say, 'hit it 8 times clean', I mean hitting it within 1 second of the previous hit. Becuase as we all know, when you hit the rock, you move away a teeny bit. So if you just press A again, there's a chance you'll swipe air, losing your 'chain'. So you have to move forward a little again before the next attempt...but if you misjudge it and dig instead, or hit a stone/iron/gold, your chain stops...and that's it. No more goodies for you until tomorrow.
So you can 'cheat' this, by wedging something next to you/behind you, so you don't move after every attempt and you can happily just hammer A without having to worry about adjusting your position after each attempt and saving precious stress. We all knew this right? Did I just find this out myself? Am I late to this rock party?!