When you protest make it people friendly and visible. A lot of time can be wasted protesting at Queen's Park where no one sees you. Public attitudes change when local citizens use events, signs and flyers in the local neighbourhoods. At Queen's Park or City Hall it is easier for Harris to brand you as a special interest group. On your home turf that brand won't stick.
People respect their neighbours.
Remember that Tories are to an extent self-defeating. When citizens get together to improve the community or oppose destructive change, it is citizen involvement in government or real democracy. The Harris idea that we are all special interests and only professional politicians and consultants can govern keeps them out of touch with the people and they lose support. Soft Tory ridings. Thornhill - Tory margin is razor thin.