You can try bifurcating the RC and the CR questions on the following basis:
CR: There might be certain types of questions that are troubling you. May be Assumption, may be conclusion, inference etc.
You need to find that out and then practice them
RC: There are always certain topics that trouble you more that others. Ex: Science, history, geography etc. Try to find out the topics that trouble you and practice the RCs on those topics.
The questions again can be drilled down into different types
...
CR: There might be certain types of questions that are troubling you. May be Assumption, may be conclusion, inference etc.
You need to find that out and then practice them
RC: There are always certain topics that trouble you more that others. Ex: Science, history, geography etc. Try to find out the topics that trouble you and practice the RCs on those topics.
The questions again can be drilled down into different types
...





