I feel really lucky that I don't (or at least I don't think) I have many blackouts. My switching is often a relay effect, one to another to another, etc. Depending on where I am, what I'm doing and why I'm switching, it can happen very rapidly and then I come back tired, dazed and/or crying because I know exactly what happened and I couldn't stop it. Usually, the switching itself feels like a loss of focus, like sudden tiredness or like a clean cut in a movie, or like in Bewitched when Samantha would appear or disappear or turn into someone else. It took me a long time to figure out it was even happening and now I'm starting to figure what triggers it and thankfully, some of the time, I can stay focused. Now that I know I'm dissociating, when I can't stop it, I at least usually know why it happened. Getting to know your triggers is a huge step. Figuring out, if you can, why they're you're triggers helps even more.