Go to Hoi An, eat, relax on the huge flat beach, marvel at the stunning old French architecture, and chill with the awesome locals. I got stuck there for 1.5 weeks due to a typhoon and loved every minute of it. Don't but a suit. Pho is 10,000 dong, not 20,000. Remember that.
Buying an old Russian Minsk and going on an epic road trip is another great idea.