Logic is the study of the methods and principles used to distinguish between good and bad reasoning. It is a normative discipline, in the sense that it does not survey and describe how we actually reason (which is the job of the psychologist) but what we should do in reasoning.
Reasoning concerns arguments. Since we often talk of an argument being true or valid (indeed it is technically wrong to describe an argument as true, we shall explain later), I discuss the relation between truth and validity in this blog. I look at certain misconceptions about logic and reasoning to allay any unnecessary fears about logic.