Trump wants bilateral trade deals because he is the big dog in such deals. He can win on each such deal.
It is important then for Canada and the rest of the world to work together and go only for multilateral deals that are of equal benefit to all countries. That means, for example, no more TPPs which disproportionately benefit US companies.
Trump is a bully and a loudmouth. While it is best not to antagonize him, it is important to work with other like minded countries to build trade that does not involve the US.