If I properly understand what you’re asking, this is referred to as Lucid Living. (Click that link to view the current LL discussion on this forum). The idea is that you take a few consecutive minutes in your day, and just observe. Try to become fully aware of what’s happening around you, and just pay total attention to what’s happening through each of your senses.
The key is to strengthen your general awareness in the hopes that you’ll more reliably detect when you’re dreaming. The theory is promising, but the success stories should be incentive enough. 