1. If you have been involved in too many accidents an insurance company will no longer want to cover you. You are costing them money and there in the business to make money
2. Too many accidents show the insurance company you are not a careful driver just as too many moving violations indicate the same thing. If you are a poor driver chances are good that the insurance company will drop their coverage of you.
3. Pay your insurance bill on time. The insurance company can and will cancel you if you do not pay your bill on time. If you are unreliable, you are asking to have your policy cancelled.
Don't make these mistakes, and you may never have to worry about losing your car insurance coverage.