After fulfilling all the obligatory acts, the best recommended acts are: helping others especially your parents and relatives then poor and needy, reciting Quran with understanding, reciting supplications with understanding, remembering Allah day and night, being in purity state day and night, remembering the Prophet and his holy Progeny with salutations (ALLAHUMMA SALLI 'ALA MUHAMMAD WA AALI MUHAMMAD) , performing Night Prayer every night, reciting Ziyarat Ashura every day, seeking forgiveness (ASTAGHFIRULLAH RABBI WA ATOOBU ELAYH). These are just few examples of recommended acts.
Wassalam.