The term 'CHECK THINGS' can be summarized by the crossword solution 'STUBS', which is an acronym for 'Systematic Tracking of Unpaid Bills and Statements'. This acronym is used to refer to a process of tracking unpaid bills and statements, which involves regularly checking and verifying that all payments have been made and that all statements are accurate. This process is often used by businesses to ensure that their finances are in order and that they are not missing any payments or statements.