In a dream, the context of the situation is often very different than what it was prior to the dream, so there is much less to remind what we were doing before the dream. This makes it difficult to spontaneously realize what we haven't been doing in a while during the dream. This is why it is helpful associating more things with blinking to give us more potential conscious or subconscious reminders of blinking during the dream.

By associating blinking with other things, I mean things like knowing situations when you tend to blink fast, notice the blinking of others, notice what you tend to think about instead of blinking, try to recall any difference in blinking during dreams. Associate many things with blinking.

The more you associate with blinking, the easier it is to remember blinking.