After driving my 09 6.7 for 6K and talking to Cummins and my dealers tech 4s this is what I am practicing. I try to limit using my trk for a daily driver as it is not made for that. It is made to pull and work hard. Daily soft driving will give you fits with the DPF. It is a workhorse so work it!
It is also made for people not used to driving diesels. I drove truck for years and am not new to these things. The computer in these makes it almost impossible to damage the engine by working it to hard. It will back things off so damage can't be done. I put full guages in mine but I can tell you unless you just want to see what it is doing and have a pre emp to things that might happen then they aren't needed. The computer limits the driver to keep damage from happening.
Driving with the exhaust break on is recommended by my diesel tech and others. They say it keeps the filter burned out better. Also if you notice the engine going through RE-gen they don't turn it off until it is complete.