All of these tips are absolutely useless for people with CFS.
I don't disagree entirely, and let me start by saying I haven't been diagnosed with CFS. In fact, there's strong suspicion that I have a primary sleep disorder rather than the secondary sleep issues that appear in CFS, but this is proving hard to untangle.
I do want to say, though, that while sleep hygiene certainly hasn't solved any of my major issues, it's also not totally useless for me; I find that in particular if I make sure my sleep schedule is as regular as I can manage, it does help some over time. For me, this has meant getting up at pretty much the same time every day, trying to nap at the same times every day during times I need naps, and aiming for bed, if I can manage it, at roughly the same time every night. The last point isn't the most important, I've found, for me. If I can't sleep, trying to force myself isn't helpful. But at about the same time every night -- about 9:30 -- I try to analyze whether I could go to sleep, and if I think it's possible, I try.
The most important that I've found overall is to go ahead and get up at whatever time I feel myself basically awake, whether it's in the morning or during a nap. If I let the niceness of the bed or my feeling of tired other than sleepiness keep me drifting in and out, I will absolutely feel worse when I do get up, and it will impact my entire day into my trying to sleep later at night. Get up when you're basically awake, sleep when you feel you can, try to make those things regular as much as possible. That's actually helpful for me, though it's certainly not a solution.
As for drugs, I'm still in search of a good solution that will keep me asleep. I have insomnia occasionally, but my bigger problem is in staying asleep, and I have yet to find anything that really improves my sleep quality well enough to keep me from getting drowsy again a few hours after I get up. My sleep doc won't prescribe xyrem without a diagnosis of narcolepsy with cataplexy, which I actually may have but is diagnostically difficult, and absent that I've fiddled with all sorts of supplements, but I still lack good deep sleep.
Exercise does jack other than make me feel terrible, I agree, and the sleep problems in CFS really aren't behavioral, they're almost certainly chemical (as with many other sleep problems, I think). But I think sleep hygiene is worth a shot, even if it's a pretty subtle help. Other people's mileage may vary, of course.