Easy - RSS feeds :) I use BazQux Reader, which is basically a modern incarnation of Google Reader. Simple, works, and totally worth the $20 subscription.
All the blogs I just listed, plus a whole bunch more, are in my "Programming - High Quality" folder - anything new in that folder is likely to be pretty good, but the total amount of traffic is relatively low. I also subscribe to several blog aggregators like EchoJS, JavascriptKicks, DZone, Planet Python, etc. Those go in a separate folder that has a lot more volume, and I skim the titles to pick out what's interesting. Then there's the "General" category, and so on.
It's a shame RSS feeds seem to have been mostly ignored after the death of Google Reader. They're a _fantastic_ way to stay up to date with a wide variety of sites.