"I folded a huge raise, and of course the 10h came out, but in the long run it has saved me heaps, the odds of getting the next needed card are very slim."

A read is what matters here. You'd push back at him unless you thought he had a set or a better flush draw, and he will do this with alot more hands. As for slim odds of getting a card, you will make a flush or straight more than half the time if you see the river. I doubt this was a good fold, but I know nothing about your opponent.