To go further than KatolaZ [1] in their distillation of solderpunk's zen of
pubnix [2] and in the form more of a meditation than a manifesto:

  re(duce|use|pair|cycle)+? 

Or in another, jouncier form:

  Use it up, wear it out, make it do, or do without. [3]

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[1] gopher://republic.circumlunar.space/0/%7ekatolaz/phlog/20190205_distilled_zen.txt 
[2] gopher://zaibatsu.circumlunar.space/0/~solderpunk/phlog/the-zen-of-pubnix.txt  
[3] http://www.rfcafe.com/references/radio-craft/war-advertising-council-slogan-march-1944-radio-craft.htm