If you have a Gmail email address, did you know that you can use it as the basis for even more addresses?
Suppose your name is Jasper Fountworthy, and your email address is jasper.fountworthy@gmail.com. You might want to have an email address like jasper.fountworthy+1@gmail.com to give to family members, say. Then you could set up a filter so that all emails to that address get handled in a particular way. You can read a detailed how-to article at How to have more than one Gmail address.
This article first appeared in the Digital Education newsletter, which is free.