If you want to go gonzo here, you can even slurp air into your mouth over the top of the wine and breath out through your nose again, picking up more sensations. Try not to choke and spray the room. In your own personal grading system. A given wine won't necessarily smell or taste the same to you and the next guy. People are just too different.
Wine is too subjective.
What's important is that you form your own impression and remember it. That way you start developing firmer opinions about which wines you like best for future ordering purposes.