Honoring one’s parent during a meal:
One should precede his parent prior to other people regarding all matters.
Preceding by a meal: Thus, for example, by a meal that the child is hosting the father and mother should receive their food portion prior to others and should receive the best of the food portions.
Preceding by a Zimun: When making a Zimun one should precede asking permission from his father prior to asking permission from others.
Washing hands first: When washing hands prior to a meal [that the child is hosting] one should allow his parent to wash his hands prior to everyone else.
 Encyclopedia Talmudit Erech Kibud Av Vaeim Vol. 26 p. 383 footnotes 177-181
 Sefer Chassidim 579
 Shach Y.D. 242:27
 Aruch Hashulchan 240:11