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1. The requirement to let a more honorable person enter first applies only when two people enter the doorway of a room that is fit to have a Mezuzah.
2. One who recites the blessing on the bread should not start cutting until most people present have finished saying "Amen."
3. The Gemara describes how one should not say "Amen."
4. Although an ordinary person may not eat Demai, there is a way for him to become fit to eat Demai.
5. One should try to be one of the first ten people in the synagogue for prayer services.
A BIT MORE
1. This excludes places like a bathroom or bathhouse which is not supposed to have a Mezuzah, as well as an opening in a passageway or a hole in a wall that does not require a Mezuzah.
2. The word "Amen" is considered part of the blessing, and the blessing must finish before one starts to cut the bread. If a few people are elongating their "Amen," one does not have to wait for them, since they are mistakenly saying "Amen" for a long time.
3. For example, one should not say "Amen" before the person reciting the blessing is finished with the blessing. Similarly, he should not say "Amen" long after the one reciting the blessing has concluded the blessing.
4. Since a poor person is allowed to eat Demai (grain or produce of one who is not careful to always separate Terumos u'Ma'aseros), a person could declare all of his possessions ownerless and become poor, thereby making him eligible to partake of Demai.
5. If he does so, he receives a reward that is equal to the reward of the entire congregation.
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