In this posting again explained the basics of Put selling 
https://www.elitetrader.com/et/thre...to-be-selling-puts.370288/page-3#post-5695032
Also good explained by the following posting: collect premium or buy the stock cheaper:
https://www.elitetrader.com/et/thre...to-be-selling-puts.370288/page-3#post-5695057

https://www.elitetrader.com/et/thre...to-be-selling-puts.370288/page-3#post-5695032
Also good explained by the following posting: collect premium or buy the stock cheaper:
https://www.elitetrader.com/et/thre...to-be-selling-puts.370288/page-3#post-5695057