Practice majorly all previous year sample papers to ensure you dont score in negative  Read as much as you can for Current affairs from Lucene and Manorama year book. For other verbal ability and Quantitative aptitude you can refer tobooks by RS Agarwal.

All tips sharedbelow. 

https://law.careers360.com/articles/du-llb-preparation-tips-by-vivek-subramaniam-delhi-law-academy