What are the physical and spiritual conducts enjoined by God during the act of worship?

Verses 29-31 of Chapter 7:

(O Muhammad,) say to them, "My Lord has enjoined justice and righteousness; (He has also enjoined that) you should keep aright your direction during every act of worship and invoke Him alone, dedicating your faith sincerely and exclusively to Him; you shall be created again just as He has created you now. He has shown the Right Way to some but has justly left others to go astray. This is because, instead of Allah, they have made satans their guardians, and yet think that they are on the Right Way." O children of Adam, dress yourselves fully, properly and decently at the time of every worship; eat and drink, but do not transgress, for Allah does not like the transgressors.