1- Planting good deeds in Jannah.
2- How do gardens of Jannah look like?

The Prophet (ﷺ) said, "For him who says: 'Subhan-Allahi wa bi hamdihi (Allah is free from imperfection, and I begin with praising Him, and to Him),' a palm-tree will be planted in Jannah."

[At- Tirmidhi].
Ibn Mas'ud (May Allah be pleased with him) reported:
Messenger of Allah (ﷺ) said, "I met Ibrahim (ﷺ) on the Night of Ascension (Al-Asra), and he said to me: 'O Muhammad, convey my greetings to your Ummah, and tell them that Jannah has a vast plain of pure soil and sweet water. It is a plain levelled land. The plants grow there by uttering: Subhan-Allah, Al-hamdu lillah, La ilaha illallah and Allahu Akbar (Allah is free from imperfection; praise be to Allah; there is no true god except Allah; and Allah is Greatest)."

[At- Tirmidhi].