Those need proofreading due to broken English.
Internet rumours is definitely a big one. There are some pieces of advice floating around out there that are at least 10 years out of date.
On the 'last minute' stuff, yes and no. If it's a first time holiday, sure. The first time I visited Japan I had every single piece of travel itinerary and maps printed out in a stack of paper. The last time I visited for a holiday I just showed up with my smartphone and winged it, booking everything as it came up, and there was no problem.