There's a statistic for the most boards where most merit is sent, then I guess you have to keep posting in that board if you are also interested with the topic.
I think this is the wrong advice to be giving.
We shouldn't be encouraging users to post in sections where they have nothing useful to contribute
I completely agree but do you question yourself perhaps? Do you ever wonder that you might not be contributing at all by answering whatever comes in your mind on any post you find? Because I didn't find your post by accident. Do you also understand that the only people that leveled to the rank of Full Member are native English speakers and the rest have absolutely zero chance getting merited?
Merit system created a closed circle in bitcointalk and it is actually a impossible acheivement for anyone not proficient in English.