Your getting lots of good advice here, and thats coming from someone who was new to this and asked a lot of questions in the beginning. Something that I did to my enclosure after seeking advice really worked well for me and my BP "Viper." I purchased two identical hides, one for the cool side @ 80 degrees and one for the warm side @ 90 degrees. I got rid of the 1/2 log thing, and went with two roundish hides with a single entrance so she could get in there and feel nice and secure. I have two UTH (Under The Tank) heaters, both controlled by thermostats with probes under the substrate on the floor of the enclosure. I have an Accurite measuring the humidity, ambient temp as well as the "hot" side. I have a second digital thermometer probe measuring the "cool" side. Viper has done quite well since I made these improvements, and she will usually strike at a F/T rat when presented to her. When she does not show interest I leave it in her cage and make the room dark & quiet. It is usally gone within an hour.
Welcome to the site, and the best of luck with your new pet.