“So make remembrance of Me, and I will make remembrance of you. And show thanks to Me, and do not be ungrateful.” [Qur’an 2:152]
Imam al-Suyuti, in Tafsir al-Jalalayn, says that we make our remembrance of Allah Most High through prayer, dhikr and other acts of worship in which we show consciousness and devotion to Him.
An interpretation of Allah making remembrance of us is that He will reward us for our faith and actions.
Also, in a hadith, the Prophet (peace and blessings be upon him) reports that Allah said, “Whoever makes remembrance of Me to himself, I make remembrance of him to My Self. And whoever makes remembrance of Me in a gathering, I make remembrance of him in a gathering better than his gathering [ie. of angels].” [Musnad Ahmad]
Finally, we show thanks to Allah for the blessings He bestowed on us. This show of gratitude is not just a verbal act, but it is by submitting our entire being in obedience to Him. Ungratefulness then, is through disobeying His commands and doing those things which He dislikes for us to do. [al-Suyuti, Tafsir al-Jalalayn]
And Allah knows best.