first thing to check first thing to come first thing to consider first thing to do first thing to do when first thing to go first thing to know first thing to look first thing to note first thing to remember first thing to say first thing to understand first thing tomorrow first thing tomorrow morning first thing we first thing we did first thing we need first thing we will first thing when you first thing you first thing you did first thing you do first thing you do when first thing you know first thing you learn first thing you look first thing you must first thing you must do first thing you need first thing you notice first thing you notice about first thing you remember first thing you see first thing you see when first thing you should first thing you should do first thing you think first thing you want first thing you will first thing you will do first thing you would first things first things first first things i first things people first things we first things you first things you should first think first think about first third first thirty years first thought first thought i first thought when first thoughts first thousand first thousand years first thread first threaded first threat first three albums first three books first three centuries first three chapters first three days first three decades first three digits first three episodes first three films first three games first three hours first three in first three letters first three levels first three lines first three minutes first three months first three novels first three numbers first three of first three places first three quarters first three questions first three rounds first three rows first three seasons first three sentences first three stages first three steps first three times first three verses first three volumes first three weeks first three words first three years first threshold first through fourth first through third