Seder means order. Here's what the seder plate means. 

We drink the wine while reclining to highlight our status as free people. We drink four cups to symbolize the four stages of our redemption from Egypt.

Baruch atah, Adonai
Eloheinu, Melech Haolam,
borei p'ri hagafen

Praise to You, Adonai our God, Sovereign of the universe,
Creator of the fruit of the vine.

Let's just assume everyone did this.

Dip some parsley in salt water. The salt water reminds us the tears the Jews shed as slaves in Egypt. Really.

This is the bread of affliction which our fathers ate in the land of Egypt.  Let all who are hungry come and eat.  Let all who are in want come and celebrate the Passover with us.  This year we are here, next year we shall be in the land of Israel. 

Fill up another cup. Story time.

The story of Passover is a story of miracles, of redemption, and of the mighty power of God to overcome evil. The Lord had promised the land of Israel to Abraham, Isaac, and Jacob. But their children were in Egypt, enslaved by a Pharaoh who had feared that these numerous foreigners would join with his enemies and turn against him. His solution was to control them by imposing harsh and bitter slavery upon them. Still, God blessed His people in strength and number. Pharaoh grew more frightened and ordered every Israelite baby boy to be drowned in the Nile River. One Israelite couple hid their little boy for three months until finally, entrusting his future to God, they set him in a basket and placed him on the river. His sister, Miriam, watched as he floated away downstream. Finding the basket, Pharaoh's daughter took pity on the child and chose to raise him as her own son. She called him Moses, meaning, "drawn from the water." Moses grew up and became aware of the anguished slavery of his people. One day, in a rage, he killed an Egyptian who was beating a Hebrew slave. Fleeing the palace and the eye of Pharaoh, Moses found refuge in the land of Midian, far from the cries of his suffering brothers, finding employment as a shepherd. Adoni saw the affliction of the children of Israel and heard their groaning. He remembered his promise to Abraham, Isaac and Jacob and raised up a deliverer to lead them out of bondage. It was then that he appeared to Moses in the midst of a thorn bush that burned with fire, yet was not consumed. Moshe drew close and listened as God commissioned him to go to Pharaoh. Fearful and reluctant still, Moshe agreed to bring God's message to the king of Egypt, "Let My people go!" Pharaoh resisted Moshe's message, as God had forewarned him. God sent plagues upon the very objects the Egyptians worshiped, yet Pharaoh would not relent until the tenth plague, the death of the firstborn.

We rejoice at the deliverance of the people of Israel, yet we are warned in scripture: Do not rejoice when your enemy falls, And do not let your heart be glad when he stumbles; lest Adoni sees it, and it displease Him, and He turn away His wrath from him. [Prov. 24. 17 - 18] As each plague is named, remove a drop of wine from your cup, symbolically expressing a diminishing of the joy of our victory at the price of the Egyptians’ suffering.

Blood

Frogs

Vermin

Wild Animals

Cattle Disease

Boils

Hail

Locusts

Darkness

Death of the Firstborn

(Ned Stark asked too many questions)

Why is this night different from all other nights?

1. On all other nights we eat leavened products and matzah, why on this night do we only eat matzah?

2. On all other nights we eat all vegetables, why on this night do we only eat bitter herbs? 

3. On all other nights, we don’t dip our food even once, why on this night do we dip twice?

4. On all other nights we eat sitting or reclining, why on this night do we only recline?

Answers

1. Our ancestors couldn't wait for their bread to rise when they were fleeing slavery.

2. To remind us of the bitterness of slavery.

3. We dip twice to symbolize the tears of our ancestors and, on the second dip, sweetening the burden of bitterness to lessen its pain.

4. In ancient times, a person who reclined at a meal symbolized a free person. We do this now to remind ourselves we are free

Ba-ruch a-tah A-do-nai, E-lo-hey-nu Me-lech ha-o-lam, Ha-motzi le-chem min ha-a-retz.

Praised are you, Adonai our God, Ruler of the universe, who brings bread from out of the earth.

Ba-ruch a-tah A-do-nai, E-lo-hey-nu Me-lech ha-o-lam, A-sher ki-d’-sha-nu b’-mitz-vo-tav, v’-tzi-va-nu Al a-chilat ma-tzah.

Praised are you, Adonai our God, Ruler of the universe, who makes us holy through Your commandments, and commands us to eat Matzah.

Make a sandwich with some matzah, haroset and horseradish

Also we're supposed to leave the door open and a glass of wine for Elijah the prophet.