USB plugs are annoying, because it's hard to see how to plug them in, and you have only a 50% chance of getting it right on the first try. But I recently noticed what seems to be a little-known feature that increases your odds. There is a little USB logo on one side of nearly all plugs. It seems that manufacturers mount their ports in such a way that the logo should face upwards.
I haven't figured out the case of side-facing ports yet, but maybe there is a pattern there as well. If your computer has such ports, let me know in the comments which way the logo should face on those!