In your particular example, just make a separate Tag "Food to Eat Before I Die" and that'd be it... simple, eh? You could also organise it as a sub-tag of "food" tag or whatever.
I personally wouldn't even use multiple tags as jeffito suggested
a tag for "Food", a tag for "Life-Goal"
First of all because I don't need a "life goal" as a separate tag.
It's best to use a single tag for a single list/topic because it's just easier. It's easier to add and it's easier to access later on. I already have some similar Tags, for example I use a Tag "books to read" and so on. I don't use separate "books" and "goal" or "to read" tags because that'd just make it harder to access this list later on.
Tags are better for organisation than notebooks because each note can have multiple tags.
Using separate notebooks is still useful in some cases. For example using an "inbox" notebook as a default notebook for new notes and a "processed" notebook for organised notes...
But other than that you don't even need to use multiple notebooks at all, everything could be organized in a single notebook and multiple different tags. There is nothing you can do with notebooks which couldn't also be done with tags except sharing notes and storing notes locally with local notebooks.
Organise each note with tags in as many ways as possible. The more "places" you put the note in, the easier it is to find it later. But give up control... Use only as many/little tags as you need, you don't want to be wasting time by trying to define all possible ways to organise each note in Evernote.
Here's for example an article I've just saved:
I don't use this many tags often. I usually use 1-3 tags.
However health is my area of interest and I have several hundreds of notes related to this topic and its sub-topics and so I used 8 tags in this case because I already had all of those tags before and I already had notes related to all of those sub-topics.
And btw organising notes with tags and organising tags themselves are two separate topics... Here's how I organise tags:http://discussion.ev...em/#entry177979http://discussion.ev...em/#entry177964
Hopefully this makes sense.