If you insist on sprinting to complete the project at the beginning, I would suggest looking into polyphasic sleep as a possibly healthier alternative. Basically, instead of sleeping once per day for 6 to 8 hours straight, you spread your sleep time across each 24-hour period and require less total sleep-time in the process. It might give you a head start on those huge projects. However, in my opinion, this should not be a long-term lifestyle.
On your profile you mention that you're studying psychology. You might then know that prolonged exertion of the mind doesn't promote mental hygiene. You'll get physically and mentally exhausted in the long run, which in turn will negatively affect your performance.
You're still young and you probably don't grasp all the consequences of this on your health and psyche on the long term. It's always relevant to maintain a healthy lifestyle and balance all aspects of your life. Otherwise, in the long run it'll probably end up costing you more (on many aspects) than what you hope to gain right now.
If your main concern is a lack of time, you should investigate more effective productivity habits. In between projects, go hang around Personal Productivity SEPersonal Productivity SE. Remove distractions, work in a quiet environment. Learn to work smarter, not harder.