If the fasting of Ramadaan comes to an end, then indeed the voluntary fasting is still prescribed throughout the entire year, and all praise is due to Allaah.
If standing in prayer at night during Ramadaan comes to an end, then indeed, the entire year is a time for performing the night prayer.
And if the Zakaat-ul-Fitr comes to an end, then there is still the Zakaah that is obligatory as well as the voluntary charity that lasts the whole year.
This goes the same for reciting the Qur’aan and pondering over its meaning as well as every other righteous deed that is desirable, for they can be done at all times.
From the many bounties that Allaah has bestowed upon His servants is that He has placed for them many different types of acts of worship and He provided many means for doing good deeds. Therefore, the enthusiasm and the zeal of the Muslim must be constant and he must continue to remain in the service of his Master.
Full Article: Remaining Steadfast After Ramadhaan