This is a great article on spending your principal.
https://www.wsj.com/articles/the-mental-mistakes-we-make-with-retirement-spending-1492999921?mg=prod/accounts-wsj
If the pay wall blocks you try googling “retirement spending WSJ” and follow a google link to the article. The WSJ allows you several free hits using Google.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwj306aD6tvUAhUDWCYKHZyhCv4QFggoMAE&url=https%3A%2F%2Fwww.wsj.com%2Farticles%2Fthe-mental-mistakes-we-make-with-retirement-spending-1492999921&usg=AFQjCNFp1LBsHNTk_kuOvM7eKMFG4HPN5w
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