At a minimum, revisit the employer’s website to refresh your memory about what they do and to check out the latest news they have posted. What stands out about them that is a big positive for you? Continuing with the university example, perhaps they have an illustrious faculty member (or two) whom you admire, or have done some important research that is significant to you, or have some famous alumni you admire. Worst case, maybe the football, basketball, hockey, etc. team is interesting to you because you like that sport. Make notes of anything about the employer that is interesting or appealing to you.