Del.icio.us

I've set up my del.icio.us account and put a link to my blog. I'm thinking how many bookmarks do I need personally? I hope when I 've completed this training or even as I'm going through it that I'll be able to link more relevant sites. I can see how useful del.icio.us would be for reference purposes and have a particular customer in mind who might find this valuable (ie if she doesn't already know about it)