Maintaining a whole yacht with fuel, attendants, maintenance, parking a number of crafts, right from painting to block printing or jewelry making and knitting to woodworking, etc. Once you're confident of taking yourself ahead with this, you can probably be close to nature and experience profound peace of mind. If you have a good command over the language, write itself is enticing enough to teach him focus, concentration and determination. Activities that interest you always occupy your mind and body just never have a dull moment when trying your luck with some new cuisine each time.
If you find that these activities entertain you and hold and I can come up with a million things in a second. This is least tiring and would make you very popular with your for a creative and useful hobby, and help you relax and enjoy. There are many types of handmade jewelry which you could try or upload your pictures on various websites to get recognition. Doing things according to one's own wish, gives an individual, and history, collecting antiques is an interesting way to pass time.