weave better networks... for myself and others.But, be careful whose advice you follow! Here are two contrasting pieces of advice emanating from Chicago. First, Betsy Hart of the Chicago Sun Times relates her experience...It used to make me crazy when people would invite my then-husband and me over to dinner, only to discover that another couple we'd never met had been included because the hosts thought we would ''just love these folks.''Whether we did or not, we'd have to spend the whole night making small talk and asking, ''So, how old are your kids?'' I was at a stage in life where I didn't want to learn how old someone's kids were. I just...