We recommend to book hotels in advance! Hotels fund in Minsk is small and you may not to book hotel at suitable price in case of late bookings. We also recommend you consider the options of booking the apartments for a day. The quality of apartments could be much more better and cheaper than hotel rooms.
On-line hotel reservationhttp://hottel.ru/belarus/minsk/allhotels.html
Well known booking.com
Information about hotels in Minsk
http://www.hotels-minsk.com/rus/hotels.htm
http://www.hotels.ru/hotels/belarussia/minsk/hotels.htm
Hotel Europe*****
Hotel Crowne Plaza*****
Hotel Minsk****
Hotel Victoria****
Hotel Belarus***
Hotel Planeta***
Hotel Yubileynaya***
Hotel Orbita***
Hotel IBB
Appartment for a day
http://www.kvartirant.by/rent/forday/
http://realt.by/rent/flat-for-day/