If one prayed a second time intending it to be voluntary due to doubt, but then one's intention or conditions change mid-prayer, may one continue praying?

Does the four-amot waiting requirement apply when one intends to pray a second prayer at the same spot rather than returning to one's original place?

Waiting Between Prayer and Eating

Does the prohibition on altering biblical verses extend to changes other than singular/plural, such as shifting from third-person to second-person address?

Insertions in Birkat HaMazon

Does initial intention to eat in a different location exempt one from treating it as change of location?

Dessert During a Meal

What standard of kavanah (intention/concentration) is required to pray a voluntary (nedava) Mincha?

Times for Maariv

If one's meal extends into Shabbat before Birkat HaMazon, should one first say Birkat HaMazon and then Kiddush, or first Kiddush and then continue the meal?

Kiddush on Friday Night

If one makes Kiddush intending to eat in one location but then changes his mind and eats in a different room under the same roof, is a new Kiddush required?

Seudah Shlishit — Third Meal