In such a situation, it becomes necessary to craft a tight, effective schedule that will allow you to make optimum use of every minute you can dedicate to practicing. This relies on several factors, including what you play when you practice, how long you play it for, what kind of environment you practice in, and perhaps most importantly, the ability to adapt and alter your schedule over time as your needs change. An inflexible practice schedule can be just as bad as an improper one.
For detailed information on all the above topics and more, have a look at the following video, in which I'll explain how to craft an individually-tailored practice schedule that will optimize your practice time for your specific needs. Thanks for reading/watching, and enjoy!