By saying “lists within lists” I really mean double or even triple listing a person you like into different lists of yours, each with a different “filtration” level. For instance, one possible list could be a general “locals list”, with a second list “Locals I talk to” and a third “Locals I know in person”.

The same simple tip can be used for business purposes as well. For instance, a coffee shop may have a general target customer base (perhaps locals in the area, or locals that have shown an interest in coffee). But from there, a sub-list of those people might be locals that are in closer proximity or are loyal and regular customers.

Once the lists are made, getting in touch with, monitoring or even doing research on each segment becomes easier as well.