Best way to lose weight fast?

hi, well here I am...
I got a gym membership a while ago... its obvious I didn't keep up with it... so here I am again..
my membership ends on February or July not sure...
well I want to know what can I do to lose the most weight before my membership end...
I also have a bad knee from a car accident.
Updates
+1 y
i called the gym and my membership ends on April 8 so I have move time... yay
I downloaded a calendar to keep track of my weight and activities...
maybe that will help me
Best way to lose weight fast?
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