Hey,
There is no shortcut for anything. You need to work really hard for any competitive examinations,be it,Civil Services or any state judiciary examinations.
Any field demands your extraordinary grit and determination. The competition is really tough out there in the world and there are lots of people who are working extensively to get these jobs.
So,find your calling and work accordingly. And don't pressurize yourself for anything and just give your best while preparing. Prepare a time table and stick to it. You can also join a coaching Institute for the preparation of the respective entrance exam.
Hope this helps.
Good luck.