I have been asked for advise, but quite frankly I'm a very chaotic person when it comes to preparation. I just did what I intuitively felt, or what my mood was to do.
One thing's for certain, I would solve quite alot of papers.
I think my IITian batchies have given you advice on what to do, so I'll just emphasise on how crucial it is to have a positive attitude and stay strong in this phase. At this saturation point of preparation it is easy to have negative thoughts. Don't. Have faith in whatever you have done.
Enter the day of JEE Advanced with a smile on your face
Maintaining mental fortitude which can easily overcome the weight of 700-1000 days resting on your shoulders that day will improve your performance alot.
I honestly had 0 expectations from JEE Advanced. I was more focussed on BITSAT and JEE Mains. But my best paper was JEE Advanced BECAUSE I was very chill.
Personality is key to unleash your potential. All over India people will break on that day, succumb, give in to pressure. You must not. That is what makes the difference from achieving your potential to getting a rank that doesn't match your preparation level.
Ciao, and best of luck.
And remember, from now : Personality is Key.