A wet heavy snow is nature’s curse for certain shrubs and trees, especially evergreens. Their beautiful shape may be disfigured for a short period of time but not usually for long. The best advice is to prune and disregard all damaged branches. As much as possible, try to reshape the bush or tree so it will have a very promising spring flush. If you have a plant that is so damaged, it loses its true look and shape, then replacement is suggested. There is nothing worse than half a tree in someone’s front yard. Please end its misery!!!
The best way to prevent future damage is through selective pruning. Prime example: you may see around town how some people trim back their Bradford Pear trees every few years to about half of their original size. Why? Since Bradford Pears are fast-growing trees, their wood is soft and this will likely cause limb breakage in their mature years. But, if every 3 to 5 years you prune them back to about half their size, their branches are stronger, fuller, and thicker, so winter damage is less likely to occur.
This applies to most evergreens as well. A professional tree company should know how to do preventative maintenance on your large shrubs and trees. Budget money toward a 5 year plan. Every 5 years my large trees are limbed up to allow more light below, and evergreens such as Savannah hollies are trimmed lower and shaped to prevent winter damage for years to come.