For me, bookmarking comes in three forms:

Social. If you want to store bookmarks online or share them with fake internet friends, del.icio.us and ma.gnolia are the tools to use. (Ma.gnolia is to del.icio.us what Pownce is to Twitter. Better, but not the standard.)

Quick access. This the stuff in your toolbar that you access for work or fun everyday... or every five minutes.

Reference. These are bookmarks that you need for a project. A swipe file. Ideas. Stuff you want to review sooner rather than later.

The third category is tricky. You don't necessarily want to store a link (that could die) online or even recommend it to others. You also don't need to add it to a list of meaningless links in your bookmarks folder, menu, toolbar, sidebar, or what have you.

Journler, the brilliant Yojimbo, and Evernote are good tools for stuff in this category.

But there's an even simpler solution, friends.

Here's what I do (in Safari):

COMMAND-I
COMMAND-S
COMMAND-W

That's right. I just save a webpage as a draft in Mail.app. It's one of the most useful tricks I know. No apps to launch. No sites to log into.

I eventually move these drafts to folders depending on my need. If I'm working on a web design and see a page I like, I just save it as a draft and drag into a local mail folder called "Design Ideas". Easy peasy.

What I like about it is that I get a complete version of the webpage that gets indexed by spotlight. The page's contents are just a search away. You can even stick some extra keywords on the subject line!

And it's fast. Mail is usually open. So after a couple of keystrokes I'm back to surfing.

I've been saving my reference bookmarks this way for a while now and it's working great.

(And, do I even have to go into the advantages for IMAP users? I didn't think so.)