[header] How to stop sucking your thumb (older kids ) [title] Have the willpower to know you want to stop and think of a reason, like getting embarrassed at sleepovers. [step] Something along those lines should help. [title] Prepare yourself. 
[step] You probably won't sleep too well while trying to stop because you always sleep with your thumb in your mouth. This may make your mouth dry so keep a drink by your bed.