I would pick up a tubing cutter for that. That gives a nice straight cut.
Any tips? Just make sure it's cut straight?
Ja, a good one does. A cheap one puts threads on the pipe.
Those fittings typically seal with o-ring(s). At least on the Sharkbite fittings, they tell you to use their reamer tool to deburr the end. You do not want the end of the pipe to nick or slice the o-ring. http://www.sharkbite.com/product/deburr-gauge-tool/ Personally, I think this is a very good idea for any of the similar tech stuff.
Important note - I'm not a pro
Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014