Where you guys get your Diesel, and what should I look for when getting mine.

I have a Murphy's, Pilot Truck Stop, Valero Truck Stop
Other than the other run of the mill gas stations

McG

 

I'm in Loveland and I get it at King Soopers (using fuel points), Murphy's, or Costco. Sometimes the Sinclair near my house has pretty good prices.

I usually use GasBuddy to find fuel. I also have a TSD Logistics fuel card that I use when travelling.