Question: How do you know which is the correct side of the doorpost to affix your mezuzah?

Short Answer: Each situation must be separately analyzed, using certain guidelines, including which way the door opens, which room has greater use, and which way people walk through the rooms.

Question: Must a new brachah be recited if a person talks in between putting up multiple mezuzos in his house?

Short Answer: There is a major dispute amongst the poskim whether a new brachah is required. Many poskim rule that a new brachah should not be made.