Hi there, ive encountered this problem numerous times before and it boils down to your style and whats happening in the scene. Ive always ended a scene when either the character A.) Has done something drastic I.E Killed someone or passed out B>) when they are content with the situation I.E just sat down for tv or a drink. Anyway I hoped this helped Bye
P.S Another word of advice. If your really stressed about something. Take a break for a bit. Hell, I usually watch movies and drink soda or eat while I write scripts or stories