“…It is recommended to use miswak and to clean your mouth before reciting the Qur’an, as well as to cleanse your body using some kind of pleasant scent in order to respect the time in which you are reading.
Wear the clothes that you would wear in front of others to look good, because you are in front of the Bestower despite this privacy. The one who recites someone else’s words is like one who is speaking on his behalf, and this is the pinnacle of honor from Allah.
It is recommended to be sitting and to be facing the Qiblah. Sa’id bin al-Musayyab was asked about a hadith while he was leaning back. So, he sat up and said: “I hate to relay the words of the Messenger of Allah (صلى الله عليه و سلم) while I’m leaning back,” and the Words of Allah are even more deserving of such an attitude.
And it is recommended to have ablution…”
['al-Hadith fi 'Ulum al-Qur'an wal-Hadith'; p. 67]