I have passed CCIE DC in my first attempt and making me triple in Ccie league.
Past 6 months I am studying INE cciedc videos. Workbooks and. I am very regular ieoc forum Visitor.
Listen INE videos atleast thrice
as we have rack shortage I have used couple of ine racks and lots of pec labs, some of racks renting from friends who has rack in there company.
Please make notes of things which u feel it's new and keep doing racks Untill u get bored and technology stored in ur brain harddisk.
Look for dc blog in Google such as ccierants etc for learning what other has discovered it ll give u edge somewhere.
Lab can be finished in 5 hr it's doable, be patient as things doesn't comeup immediately.
And best of luck to all.