Preparing for my US trip

Will be attending a course in San Bernardino next month. With only 3 weeks to go, I am kinda freaking out. The course material is tough stuff. I hope I can come back with a pass. My fourth trip to the United States, this time I will be travelling alone again. After my course, I will be flying from the west coast to the east coast to revisit New York City. I missed New York. I will be spending a little time there and then I will travel to Washington, Niagara's Falls and Boston. Will update again once I am back with photos!