I have thousands of links in my del.icio.us account. Once in a while I pick some of the best ones and submit them to HN if they're "hackerish" enough. Searching for stuff on Wordpress.com sometimes yields some true gems too.
I was thinking the same about your link quality myself. What's your background (technical)?
Electrical Engineering: Signal Processing & Control Systems. I am also interested in Information Theory and Estimation Theory.
Knew it! I could tell by some of the submissions and comments.