New Stamp Sheets/Books

I have been stumped as to what to do with new stamp sheets/books. When I buy a new sheet/book of stamps, I am unsure of what I should do with them. As much as I love to have the entire sheet, I feel "greedy" as if I should share them with others. When I send out a letter I would normally buy a few singles to complete the order.

So when you buy a new sheet/book of stamps, what do you do with them?

I usually set aside 1 face different mint stamp for non souvineer sheet stamps and a full pane for SS's. What I keep for my collection varies on the format of each issue and my preference of the stamp. I prefer to use commemoratives on all my outgoing mail and do not use Forever's if I can help it.