What next after 30 Day Shred?

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I'm on day 18 of the 30 Day Shred today, and am thinking ahead to what to move on to after I finish. I've enjoyed the Shred so far, and like Jillian's style, so was looking at her other DVDs - any recommendations? I'm trying to work particularly on my abs and general fitness and stamina to help my running.

Thank you!