Sayyidunaa Ubaadah bin Saamit (radhiyAllahu anhu) narrates that Rasoolullah (Sallallahu Alayhi wa Sallam) used to teach the Sahaabah (radhiyAllahu anhum) the following Dua at the approach of the Month of Ramadhaan:
“O Allah! Safeguard me for the Month of Ramadhaan (by making me see the Month of Ramadhaan healthy and fit so that I can take maximum benefit from it), and safeguard the Month of Ramadhaan for me (by making the conditions in it such that I can take maximum benefit from it) and accept it from me.”
(Kanz-ul-ummal, Vol.8, Pg. 584 Hadith 24277)
Every Muslim should endeavour to memorise this dua and recite it in abundance in these few days before Ramadhaan.