First there are so many different types of snares and traps, you need to determine what type/size of critters your going to be going after. The animals in the area you will be doing this in will largely determine this. Second will they be ground dwellers, tree dwellers or both. After you decide what your going after, the best way would be to find someone who has done this before and have them show you. But seeing that you’re asking here I suppose thats probably not going to work. Second best is to look on the Internet or our local library there are some instructional videos and books that can show you how to do it. After you watch a few videos or read the books, go out to the nearest patch of woods (after checking local regs.) and try out your new knowledge and turn it into a new skill. One word though be patient it will take several tries to get it right.