Are there methods to avoid incidence of seizures?

Absolutely not. You can reduce recurrence of seizures by adaptive means. For e.g. every child who has seizures must avoid sleep deprivation. Lack of sleep is a major determinant for the recurrence of seizure episodes. Sleep deprivation cannot cause epilepsy but rather increase the chance for an already existing seizure propensity in the child. But, no, you cannot prevent seizure occurrence.