How to reorganize the missed cards?

Hello every one!
I have had a three weeks period exams, during which I let all my reviews accumulating. Now, I have more than 1000 cards in my deck. How can I reorganize them in order to do them all but in a way that it won’t be so difficul or boring so as not letting Anki down ?
Thank you :smiley:

The manual has a section about this:

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