I guess this OP is looking for merits because he or she wants to rank up or maybe because he is in low rank he can not join to some activity here.
Anyway getting merits is not just like a snap of your fingers "I want merits", people who are in the position of giving you merits can give you easily if your post is constructive and very informative and can help the community here. It will just come if you work for it. Many people who are eligible of giving merits can read our post and maybe if they can see that you deserve one then I guess they will.