Messenger of Allah (ﷺ) commanded Mu'adh bin Jabal (RA) to recite this supplication after every (prescribed) prayer -

اَللَّهُمَّ أَعِنِّيْ عَلَى ذِكْرِكَ وَشُكْرِكَ وَحُسْنِ عِبَادَتِكَ

Allaahumma 'a'innee 'alaa thikrika, wa shukrika, wahusni 'ibaadatik

O Allah, help me to remember You, to give You thanks, and to perform Your worship in the best manner.

Reference: Sahih (Albani). Abu Dawud: 1522