Similarly to Genghis, I use paper charts & soft pencils. I loathe laminated charts & the rooting arount with needing 'special' pens, wipers etc.
Paper is so much easier to fold & is less bulky. A soft pencil can be erased easily & without harming the underlying surface, you can use the same pencil on a whiz wheel, flight plan/plog, notes etc etc.
Pre-flight I mark the track(s) on the chart. Nothing else.
In flight I mark pinpoints/fixes & DR or air positions along with the time. If a major heading correction then I may add the new heading to the fix details. If diverting I mark the track(s) as per my pre-flight item.