Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Ruby negi
and if you really want to learn experiments, then try NCERT books first, hc Verma book is too nice.. all standard books of Physics contains experiments ,all the good..