After Iftaar

Recite:

ذَهَبَ الظَّمَأُ وَابْتَلَّتِ الْعُرُوقُ وَثَبُتَ الْأَجْرُ إِنْ شَاءَ اللَّهُ

"The thirst has quenched and left wetness and with the will of Allah, reward is proven (certain)" (Abu Dawood etc).

At the begining of making wudu

Recite:

بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ

"I begin in the name of Allah, who is the Most Merciful, Most Gracious".

It is stated in the hadith that one should begin wudhu with Allah's name. No words have been specified and our elders read the above. It is recorded in some ahadith that wudhu is valid although no "Bismillah" is recited. (Mishkat)

On completion of wudu

Look towards the sky and recite:

أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللَّهُ وَحْدَهُ لَا شَرِيكَ لَهُ وَأَشْهَدُ أَنَّ مُحَمَّدَاً عَبْدَهُ وَرَسُولَهُ

"I testify that there is no one worthy of worship besides Allah. He is all by Himself and has no partner and I testify that Muhammad is Allah's Rasul (Messenger)".

Eight doors of Jannah will be open for the reciter of this dua. He will be able to enter from whichever door he pleases. (Mishkat)

It is recorded in the same narration that the dua should be recited three times. (Hisnul Hasin)

Thereafter this dua should be recited

اللَّهُمَّ اجْعَلْنِي مِنَ التَّوَّابِينَ وَاجْعَلْنِي مِنَ الْمُتَطَهِّرِينَ

"O Allah, count me (make me) among those who seek forgiveness and amongst those who stay clean". (Hisnul Hasin)

Also recite this dua

سُبْحَانَكَ اللَّهُمَّ وَبِحَمْدِكَ أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا أَنْتَ أَسْتَغْفِرُكَ وَأَتُوبَ إِلَيْكَ

"O Allah, You are pure, I praise You and testify that only You are worthy of worship and I seek forgiveness from You (I turn to You for forgiveness). (Hisnul Hasin, from Mustadrak)