Keep in mind folks that NetJets is not a regional airline equivalent. It is a brass-ring job - on par with a major airline job.
Just as you would not expect a CFI or recent flight-school graduate to be hired by a major airline, so too would one not expect to be hired by Netjets fresh out of school or as a CFI.
Build your time the same way you would if your career goals were United, Delta, or Southwest. If the time comes that you look yourself in the mirror and are able to say:
"I don't CARE how big my airplane is."
"I don't CARE whether I fly overseas or just back and forth to Teterboro"
"I want honest pay for honest work."
"I want a good lifestyle with plenty of time off."
"I want benefits that meet or exceed those at the airlines."
Then make that step towards a NetJets interview understanding that working for NJA should not be considered a stepping stone, but rather a career destination.
-Zap (who does not work for NJA but is extremely impressed by their business model)