Most people forgot this piece of original gmail documentation from Google about the formand shape of your gmail address.
It basically confirms 2 things:
that the . (dot) is not relevant in your emailaddress and
f.o.o.bar@are all the same.
adding a + with text is also fine and can be used to track where your emailaddress ends up after you filled it in on a registration page on a website.
foo.bar+my_label@is perfectly fine and shows up in your inbox just fine.
Now go and use these tips to create (basically) aliases and set up Inbox filters to keep the Inbox clean !