Question: Hi Tom, I can see that there is no self, but if there is not a doer, what do you do when is time to take a decision that seem to be very important, like calling or not calling a woman you like?
Tom: Thinking just happens when it is needed.
You can conceive of it this way: the heart is an organ in the body, and its function is to pump blood around the body. When you exercise, the natural intelligence of the body means that it pumps faster.
Now see the brain and thinking in the same way. The brain is an organ and (one of) its function is to think. When thinking is required, eg. when making a decision, the natural intelligence thinks out a decision based on the information available to it at the time. It happens by itself, as it has always done.
Of course, as with all skills, one can learn to make better decisions, and both learning specific techniques and having experience in making decisions can aid this process.