The fastest way is to know SPECIFICALLY what you want by writing strong purposes and detailed mind probe questions and then just SuperRead till you find it, after the PR step of course. The purpose(s) will keep you from stopping on unrelated ideas. If you read without it you'll stop on everything that looks good.
If you don't know yet what info is important, gather trigger words of what you "feel" would be important during your preview (you can re-preview anytime). When you stop and dip on those words during superreading they'll probably be related to other concepts (more words) that you didn't pick out initially and you'll dip on them too and you'll probably end up over dipping again but you'll be in a better position to make up mind probing questions for another round of Superreading. May sound like alot of work, even SLOW but believe me, you are reading actively and will remember it alot better this way.