I have seen people seemingly careful to sit down when beginning the paragraph of prayers that starts "Ashre yosh've vesecha" (Ps. 84:5). One such person told me that he was, in fact, careful to do so, ...
Most (but not all) Siddurim have the פסוק of ויהי נועם at the end of הנני מוכןs (such as before ספירת העומר, before the ארבע כוסות, or before בדיקת חמץ). Where does this practice come from and why is ...