I dreamed I and my husband were going to the airport from our flat. The flat looked exactly the same as the one we have now. We checked everything, the cat stuff, the doors, and the lights before the departure. Then we locked the gate, but found out that the light in the living room was still on. I asked him to open the gate and turned off the light. He said we could turn it off from outside and he did and the light went off. I felt strange. Afterwards, we took the bus to the airport. When we arrived at the airport, it was the airport in Germany. I felt strange further.

In the morning, when I woke up, I thought if we could get alerted to the strange points in the dream, we would have a chance to have a lucid dream. Point 1: when my husband said he could turn off the light from outside. Point 2: Our flat is in Taiwan, so the airport should be in Taiwan, too, not in Germany. But how can we get alerted to the strange points in the dream?