I do not have the luxury to make mistakes when sending sMerits. I have very limited number of sMerits to send. It's an advantage for me I guess.
Before sending sMerits I do a lot of research on the member. I have a sMerit sending waiting list. Whenever I see a post looks good to me I add it to my list. Then I do some research on the member (no rush when I get time), if I see the member is really doing good job for the forum then I award him/her my sMerits.
The perimeters I consider:
1. Plagarism free
2. Constructive and related to the topic
3. Not a merit seeking post
4. Previous post history
5. Previous merit history (mostly to avoid merit abusers)
etc
I said it before somewhere and saying it again, I wonder how you guys deal with sending sMerits. Sending sMerits seems a hard job to me. Sometimes I even forget that I need to send sMerits in some posts.
PS: It will be interesting to see your ignore list