How do you manage contacts on your Mac? The straightforward way, is to use Address Book to keep a set of contacts updated, and this works well for providing other apps with contact info.
However, there are often times when I want to group people into lists (threads, conversation groups, distribution lists.. whatever). Mainly for a quick task of pinging a set of people, but not another, very quickly. If I set myself a task to contact "People interested in foo," then I currently retrace my way through the conversation thread in Mail, and copy people into a blank message.
There must be a better way, surely? Like a local CRM, but simpler, quicker and... well, less Salesforcey, if I'm honest.