For summer junkies, Labor Day bids 'aloha' to suntan lotion, flip flops and endless, lazy beach days. Even stalwarts who drag their work with them to the beach or cruise can suffer summer withdrawal. For some, autumn chill brings a fresh sense of renewal while others feel as glum as when they were handed their book bag and bus pass each year. You know who you are. Post-summer letdown is common -but vacation revelations and memories don't have to fade faster than your tan. Before you throw in the summer towel, here are a few things to make the fall transition easier: