Utilize your free time and not to consume every penny what you earn.
You always need to spend of your money at least at little bit for your personal things and you really need it. No matter what you can't cut your personal things you just need to find more jobs or make more profit so you can save some penny
Yaeah thats right spend a little bit of your salary,dont stint yourself you saving your personal sake your saving will spend what you ever like so dont stint so that you can save.
if you think about it, buying healthy things(like better foods, supplements, better stuff for personal care ecc...), will make you earn more actually, because staying in good shape will help your body's stamina, thus becoming stronger and more resilient to fatigue, and this will bring the possibility to do more than 1-2 jobs, eventually you earn more...
yeah if your job is only sitting on your office chair and doing a office work and you dont have any idea about exercise you would have weak body and also many sick will come to you. Having a good body will allow you to have more than 1-2 jobs with a minimum salary and also you can do physical activities.