In three words, the answer to how to make Vaheguru happy is - ਹੁਕਮਿ ਰਜਾਈ ਚਲਣਾ - Razaayee Vaheguru de Hukam Vich Chalna - to walk in the Hukam of Razaayee Vaheguru i.e. to live life according to the Hukam of Razaayee Vaheguru.
What is Razaayee's Hukam? Razaayee Vaheguru jee's Hukam is the Updesh of Satguru i.e. Gurmat which includes the Prime Hukam of Naam Abhyaas and obeying all instructions of Guru Sahib listed in Gurbani and other sources like Bhai Gurdaas jee's Baani, Bhai Nandlal jee's Baani and authentic Rehitnamas.