You can filter email and other stuff. This includes a lot of stimulus that can aggrevate a lot of symptoms.
How do you do that? Here are a few suggestions:
Depending on your situation, try anywhere from 1 to 5 days of almost no information:
No news, talk stations, web sites, etc.
You're only allowed to listen to music, read fiction. Or use a site that's absolutely necessary.
Also, no IM chat.
Try this and see how you feel. Also, limit your time online and see how that works.
Another idea. It's a variation on the AA cut-yourself-off-from-dangerous-stuff. Set boundaries in various areas (email, use voicemail, cut off toxic relationships, etc.).
The underlying idea here is two-fold: protection and balance. Otherwise, others will be asleep and you'll be up all night dissociating and fighting lucid dreams.
And really, we deserve better than that.