Don't be concerned about making informed* decisions about doing one or more of the don'ts, for example:
-a squirt of WD-40 or a dab of motor oil (say at a gas station) on a drivechain can be a quick fix for an annoying squeak until you are home and can clean and do the job properly. Or even do this just before leaving home before a short ride, say if you went to long between chain cleanings a wipe of WD can disolve the crud and temporaily make for a smoother chainline. Just do a good proper cleaning later.
-A 6" adjustable wrench can be useful on the road vs. carrying all sizes. Just use care to adjust it properly and don't push limits which could cause slipping and stripping.

Another non maint don't that is OK in very short doses is using cog/chainring x-chain extremes. Sure it will cause more wear and less effciency, but if you do it for a short hill cause you forgot to plan ahead nothing will be lost.

*informed means undertanding they whys of a don't and then doing the don't in way that addresses the concern.

Al