The Westmount Shul in Toronto has some excellent guides (check with your own Rav to confirm as some of these offer psak in particular difficult situations)
Seder Requirements for Diabetics
Seder Minimums for Those Who Must Rush
How to have a Sensational Seder
The Step – by – Step Pesach Seder (Excellent Pointers along the way)
Shannon Road Resident says
There is a Machlokes if you can eat the afikoman after Chatzos, which has origins in the Mishna. The Avnei Nezer postulated if one is approaching Chatzos, and has not finished Shulchan Orech, he should eat a piece of Matza on the Tnai if the Halacho is the Afikoman has to be eaten before Chatzos, and as we know it is the last thing which can be eaten until the zman of eating the afikoman is over, then this is the afikoman. On then waits until chatzos, and if the zman for eating the afikoman is over, then one is permitted to eat anything. One then continues his seder as normal, and by the afikoman, if the zman for the afikoman is over, he is merely eating as if it is the next day; and if the zman is not over, then he is now eating the afikoman. Although this can be halachicly complicated, many Gedolei Yisrael, including R’ Ahron Kotler relied on it.