I would certainly advise Canadians to limit the number of devices they bring to the U.S. and to review and limit the information that is found on the devices they're bringing with them to the United States. I think it would be prudent to see whether you could leave in Canada on local devices, your home computer and whatnot, information that you want to keep and that you may not need in the United States.
Another potential measure would be if professionally you need information in the United States, say information protected by solicitor-client privilege or other legal privileges in Canada, and you don't want it to be reviewed by U.S. customs officers, you may want to put it on a secure part of the cloud, for instance, so that it's retrievable once you are in the United States and you can access it then. In short, think hard about what kind of information you want to bring with you in your electronic devices as you cross the border because we have heard that information can be required by U.S. customs officers. It's prudent to act accordingly.