Read through The Qur’an and make duas based on verses or words out of The Qur’an using Allah’s names relating to that topic (i.e. O Al Haadi [He who guides] guide us to the straight path, the path of those Whom You have favoured and not of those who have gone astray) or another example would be to just make up your own duas based on words used in The Qur’an (i.e. when you come across the word ‘prayer’ as an example, you could say “O Al Hameed [The All Praiseworthy] make me amongst those who establish prayer and give You praise alone, for You alone are worthy of all praise”)
I hope this helps us make a lot of beneficial supplications inshallah. And may Allah accept our efforts, inshallah. Ameen.