There are various strict rules regulating the manner and timing of saying "Amen" following a blesing. In fact, the Gemara (Berachot 47a) lists some pretty severe punishments for people who violate ...
When one is saying a b'racha and realizes only after saying God's name that the b'racha is no longer valid, he can avoid the problem of uttering God's name in vain by tacking on the words "למדני ...
Many times I listen to recorded Shiurim (lectures) where the speaker says a Brocho (usually Shehakol on a drink). Should one answer Amen to such Brochos?
Can you say amen to a bracha if you hear the last part, see a gesture of ending, or is it only if you hear all of the brachah.