Coffee can help wake you up and it helps you to be able to focus and makes you more alert. Daylight has a significant effect on our circadian rhythms. Convince your body that it's time to be awake, despite your lack of sleep by giving it a big dose of light.
Also, if you believe you are well rested, your brain will perform better regardless of your actual sleep quality. You might also try a rejuvenating scent such as orange or peppermint, which can arouse the senses and trick you into believing you are awake.
The placebo effect is well known in medical science. Tell a person they are receiving a substance that will have a certain effect and that often proves to be the case, although there was nothing in the substance to cause it. The brain is tricked into expecting a certain effect.
An experiment was carried out to see if the same could be true in the case of sleep. Students received a lecture about sleep and those who were led to believe that they had received a better quality of sleep than the average person, went on to perform better on a cognitive test than those who believed their quality of sleep had been deficient.
Therefore, by receiving false information about your quality of sleep but information that convinces you of its truth may well trick the brain for short term effects. But long-term, th body's need for 7-9 hours of sleep per night for remaining healthy cannot be overturned.