Here are a lot of accomodations, from basic and cheap guesthouse to newly built hotel. If you´re not looking for the cheapest in town, try New Siam II Guesthouse or New Siam Riverside with swimingpool and breakfast buffé just beside the river. Only 5 minutes from Khao San Road.
Afternoon shopping, Khao San Rd.
Khao San Road in Banglampo area you will find several travel agencies. For an exempel you can choose between Lomprayah, Seatran and Songserm they offer travel packages. Bus and boat to Koh Tao for 950 baht.