Bismillahir Rahmaanir Raheem
1.
To
enter with the right foot.
(Bukhari-Chapter on Salaah pg.
61)
2.
To
recite 
(Ibne Majah pg. 56)
3.
To
recite Durood Sharief e.g.
(Ibne Majah, Faydhul Qadeer
Vol. 1, pg. 336)
4.
To
recite the Dua:
(Ibne Majah)
5.
Make
intention for I’tikaaf. (Shami- Vol.2, pg. 442)
From "BEAUTIFUL SUNNATS OF THE BELOVED
NABI (SALLALLAAHU 'ALAYHI WASALLAM)
By Hadhrat Moulana Shah Hakeem Muhammad Akhtar Saheb
(Rahmatullahi 'alayh)
Download the book here