After performing shavasana do not drink water for ten minutes and do not eat anything for half an hour.11.
If you intend to go outside right after doing the asanas and the outside temperature is colder then indoors, put on warm clothes.12.
It's not recommended to perform any physical exercises, run or play sports right after asanas practice.13.
The following asanas can be done without restriction in diet and breathing: padmasana (lotus posture), siddhasana, ardha padmasana, pose with crossed legs ("eating posture"), hero posture, long salutation, yoga posture, and cobra.14.
Women should not do asanas during menstruation, pregnancy and after childbirth within a month. The exception is the postures for meditation.