From How Goodly Are Your Tents, Oh Jacob (#E-102) by Rabbi Avigdor Miller
Q: What’s the ideal middah (character trait) to work on Pesach time?
A: On Pesach time the first thing is to think, "Baavur zeh asah Hashem li b’tzaisi m’Mitzrayim." Think what Hashem did for you. — what He did for you, that He made you into a person that has a future.
You’re living in this world for a future. He gave you a Torah and He taught you how to produce maasim tovim, how to live correctly, and the end will be in order to give you the happiness forever and ever in Olam Haba (the World to Come).
You should never forget that what He did for you
So we have to thank Hashem He took us out of Mitzrayim. When He took us out of Mitzrayim we were finished with the gentile influence. He took us into the midbar (desert) where we were all alone. We had no connection with the goyim. And he gave us a Torah.
Therefore the coming out of Mitzrayim was a very great happiness. But don’t think it’s a national happiness on a national level. "Baavur zeh asah Hashem li," everybody should think he is the one who went out of Mitzrayim, because we’re getting the benefits that we went out of Mitzrayim. And therefore there’s no end of gratitude because Yetzias Mitzrayim we become obligated in hakaras tov (gratitude) to Hakadosh Baruch Hu forever and ever.
All our lives — "L’maan tizkor es yom tzeischa m’eretz Mitzrayim kol yimei chayecha — You should never forget that what He did for you..." What he did for you, personally. That’s how you have to remember Yetzias Mitzrayim.