This seems like such a no brainer and basic feature yet it is not available.
I would like to be able to have the option to have my customer list displayed with Last Name first.
For example if I enter customer Joe Smith (displayed in that order) and a month later his wife Betty Smith calls I will likely have two entries because I did not realize that I have the Smith household in my system already, but if I could sort the customers by last name first I would obviously realize this and not have a duplicate entry. I would imagine this would save space on your servers as well.