You can create filters in gmail using the 'settings' option. There you can specify various things such as. Sender's address, recipient address, subject line. etc. You can then add a label to these emails and this will show up in the left hand side of your inbox.
Also, if you want to filter by recipient address, you can reformat your email address. For example if your email address is [email protected], you can send emails to [email protected] and it will still come through, any number of full-stops (.) are allowed. Another option is to use '+' which would be [email protected]. The email will come through to the same account every time.
I hope this helps.