Anesthesia machine/room check
Anaesthesiology   Wikipedia  
Monitors (EKG, SpO2, EtCO2, etc.)
Suction
Machine check (according to ASA guidelines)
Airway equipment (ETT, laryngoscope, oral/nasal airway)
IV equipment
Drugs (emergency, inductions, NMBs, etc.)

 Mnemonic:
MS MAID