1. practice, practice & more practice
2. review errors
3. master the key concepts
do not try to memorise the processes.
4. understand your doubts.
5. create a distraction free study environment
6. create a mathematical dictionary
7. apply maths to real world problems.
time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)