Learn to create reasonable topics on the forum or try solving some one issue you will definitely get merit doing so, do not go online using search engine and copy-pasting, doing so will get you banned.
I don't understand why someone need to give a guide to him how to get merit, it's just like his motivation joining this forum only to earn merit. If he start forget about merit and put more effort about anything he like or contribution, sooner or later he will get at least 1 merit.
Copy pasting and including the original source is fine, but if he's copy pasting without the original source, then it's not allowed.