I'll go to Bangkok + Phuket for 10 days in coming summer. For Bangkok's hotel, I've booked Rongratana Executive Residence at booking.com website. They're doing promotion and I've booked a stuido deluxe room with HKD4xx only. You can go to see their flash deal.
For phuket's hotel, I've booked Centara Grand Beach resort for 2 days and still looking for a hotel in Patong area for other few days.