Recite while sitting in the same spot: subhanAllahi wa bihamdihi subhanAllahil 'Adheem 1200 times.
Recite the following salawaat: Allahummah salli wa sallim 'ala nnabiyyil ummiyyil shaafi' almushaffa700 times (Oh Allah send your blessings on the unlettered prophet the intercessor whose intercession is accepted).
Recite: Ya dhal jalaal wal ikram12 000 times (O Lord of majesty and grace).
Recite: HasbunAllahu wa ni'mal wakeel12 000 times.
The cycle goes from maghrib to maghrib. Whatever is not complete carries into the next day.
The 2 Rakah of intention is only to be performed once for the whole 'itikaf period (not daily).
If one cannot complete both #5 and #6, then they should do one only.
Sleep at night should be completely avoided. One should stay awake until Doha or until Dhuhr.