See there is no such shorcuts as prescribed in any book. It is the students mind which finds ou any trick bbased on his knowledge. But as you have asked the best objective books,in market there are many, i will suggest either you go with cengage or you go with arihant in maths, because in mathematics it will be good if you solve more number of questions. In physics , first is hc verma. It is compulsory after that gowith either cengage or arihant.

In chemistry go with balaji publication, it will be good.