Winter is just around the corner. And for those of us in snowy regions, shoveling time (ugh!) will soon be here. Now is the time to purchase a good snow shovel, but before you do, think about the kind of snow shoveling you need to be doing, what size blade makes the most sense (the bigger the blade, the heavier the shoveling) and whether you prefer a straight handle or one that’s swooshed with a more ergonomic design to ease back strain. Here’s how to sort out all the choices to make your best buy.