some people find an affirmation helpful - I used: I welcome every contraction. [while breathing in] Each one brings my baby closer. [While breathng out]
Or maybe a visualisatino - some people imagine their cervix opening, or their baby descending, or maybe they're riding waves (contractions)
moving in a particular way or doing some sort of vocalisation may also help. sometimes it's hard to know what will till you're doing it. what did you do last time?