How to train dogs and how to make a dog happy?

My dog is small, picked up from the outside, it does not indiscriminately urinating, I took it out, it was urine. But it is go out for fun, but I do not have time, there is no way to make it happy? I would like to train it will shake hands, will be accompanied by more. . . . What training?

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simply asked to shake hands, give it food