Learn Gemoro; If this is too hard, listen to one of Rav Avigdor Miller’s tapes:- This shall keep you occuppied for 90 minutes.
You can also study this week’s Haftoro, because doing so, shall already make you ready for the Haftoro of Shabbos Chanukah.
How did you Vogue keep yourself busy over Shovu’os nite? Whatever worked then:- Try now.