There are many supplications to avoid harm and get protection from harms like:
1. Repeating Estighfaar ( ASTAGHFIRULLAH RABBI WANATOOBU ELAYH).
2. Repeating Salawaat ( ALLAHUMMA SALLI AL MOHAMMAD WA AALI MOHAMMAD).
3. Repeating ( LA HAWLA WALA QOWWATA ILL BILLAH ).
4. Ziyarat Ashura every day.
5. Night Prayer every night.
and many other recitations.
Wassalam.