I use the timeboxing technique daily to maintain a tab on time spent while surfing the net. Also there is a particular workflow that works with me now, for which I use a couple of tools to achieve. I use feeder.co to keep track of my feeds and newsletters. There's a daily folder which I check daily, and for others I subscribe to weekly newsletters so that I get curated content which saves me my time. In the weekdays I just stash interesting articles, projects, etc that I discover among my feeds to instapaper. I have linked the instapaper folders to my RSS reader with RSS so that on weekends I can check my stashed items. On the weekends I go through them all as I have free time on hand and then organize them into Raindrop.io bookmarking tool neatly. So it's, discover, stash, read, and then organize workflow with me.