After I have cleaned the berries, I arrange them on cookie sheets, sometimes I line it with wax paper. I try to get them as close together without them touching. Then I place the cookie sheet lined with berries in the freezer. I leave it in freezer for an hour or two, until they are frozen solid.
Once they are frozen, I take the berries off the cookie sheet and place them in freezer bags. I make sure I label the bags with what's inside and the date. By doing it this way I don't have to worry about the berries freezing in large clumps. Makes it so much easier getting the amount I need out of the bag to use for smoothies or other recipes.