May seem pretty elementary, but the tool that has saved me the most time is a hand priming tool from RCBS. I used to prime cases on the press, now I can sit it my recliner in front of the tv, or have a conversation with the family while priming, and I can be done in a quarter of the time.
By the way, I'm one of those new reloaders that was overwhelmed with all the high end tools that I "needed" when I stared reloading. But I bit the bullet and purchased them and I wouldn't have it any other way. I've always jumped in with both feet, whatever I'm doing. The only step I haven't taken yet, is to buy a neck turner. Not sure how much longer I can hold out on that one.