Do the simple thing first. 
    Do fewer things better. 
    Upfront work but can pay huge dividends. 
    Don’t reinvent the wheel. 
    Nothing lasts forever. 

http://highscalability.com/blog/2015/10/21/5-lessons-from-5-years-of-building-instagram.html

https://www.infoq.com/interviews/adams-php-facebook