As we all knows we need activity and merits for level up, I was inactive from very long time , i never notice about merit things before maybe anyone can tell me what is easy way to get it. 
Keep in mind that even if you post nice things, truth, real-talk, technical things, you will rarely get a merit point.
If your goal is to level up just to make your brain feeling better then start changing your mindset because it's useless for you and a waste of time, start/keep working on valuable thing instead.
Don't waste your time if you don't have a real interest of being upgraded, like presenting a future project or a social interest. Personally i have both, i think that some people need help so
it's also a social interest, to keep this world better everyday.