The gaze should be fixed on the place of Sajdah during Qiyaam, on the feet during Ruku, on the nose during Sajdah , on the lap during Qa’dah and on the shoulders during Salaam. When one has an urge to  yawn during Salaah, he should stifle  it as much as possible. When one has an urge to cough during Salaah one should try as much as possible to suppress it.

(Extracted from A’ina-e-Namaz written by Mufti Sa’eed Ahmad Saheb, () the Mufti-e-A’zam (grand Mufti) of Mazaahirul-uloom.
1.        After every Fardh Salaah recite one of the following Duas. After Salaam it is sunnah to recite  thrice. Thereafter recite;

(Hisne Haseen , FathulQadeer- Vol. 1, pg.439)
Trans: O Allah, You are the possessor of peace, peace can only be attained from You. You are full of blessings, O The powerful, The Most Kind.
Note:  With regard to the words:       

Mulla Ali Qari () writes in Mirqaat [ Vol. 2, pg.358]  that there is no substantiation for these words in the ahaadith, they are merely an addition by some story-tellers.

2.       
(Hisne Haseen )

3.       
Trans: O Allah, I seek your protection from cowardice, from becoming senile, from the trials of this world and from the punishment of the grave.