I usually spend an hour or so while I'm waking up in the morning/ afternoons/ or when ever I wake up, dependent upon when I got to bed.
There are days that I'll stop back in a few times to see what's going on, others it's just the morning ritual.
I'll usually start in the general discussion, and work my way down. There are days that I'll hit almost every sub category on the way, there are others where I'll check out the '09-'13 sections, then lighting, etc. I almost always end up in the off topic at some point.
Also if I've started any topics of late, I'll usually swing by to see how badly others have been ridiculing me for my obvious ignorance