Singleton: How should it be used

Question

Edit: From another question I provided an answer that has links to a lot of questions/answers about singletons: More info about singletons here:

So I have read th

Answer 1

I find them useful when I have a class that encapsulates a lot of memory. For example in a recent game I've been working on I have an influence map class that contains a collection of very large arrays of contiguous memory. I want that all allocated at startup, all freed at shutdown and I definitely want only one copy of it. I also have to access it from many places. I find the singleton pattern to be very useful in this case.

I'm sure there are other solutions but I find this one very useful and easy to implement.