I know a lot of my longer posts have weak endings. This is for two (or three reasons):
1) I never know how to wrap things up and even in real life end up just trailing off, like....well, y'know...yeah, anyway...
2) It usually means I started it before the kids were around and now they're sitting on my lap, so after a half hour gap, I need to wrap it up as quickly as possible before someone sits on the mouse and clicks the "close window" button.