Out after 10 Years (19): Lessons Learnt

The recent trip to Japan was great. I put it over the top, over my trip to Bavaria, Germany, perhaps because I saw more places and stayed longer, not that Germany isn't great! However, I made a few mistakes which I would like to list them here, as a reminder to myself, as I'm going there again next year(!) and whoever is travelling soon:
1) Book your JR Pass before the trip, if you're going places, and pick it upon your arrival. I traveled more than 2,900 km (roughly 1,800 miles). It helped a lot. Besides I care about comfort. 
2) Do not haul too much. It will hurt and you won't enjoy your trip. Space is limited, particularly in hotels. When I was leaving Tokyo for the southern part of country, I had three baggage! My big pack, which was not heavy and distributed alongside my length(!), computer bag, this was a mistake as I intended to stay in touch with work and that's a heavy one and a full bag of purchases, including souvenirs! 
3) Leave most of your shopping to the last day, if you're traveling around the country like I did, or you'd haul a lot. Since the majority of flights land in and depart from Narita, you can assign the last day to shopping. 
4) be prepared for the food that you're not used to. I don't eat Rice, Noodles, most of the seafood or perhaps I shall say I don't eat seafood every day, White Bread or anything made of White Flour, raw fish and I basically starved most of the time during my trip! I need to have a plan for the second trip!
5) Have a second mobile phone with you to purchase a SIM Card in the airport. You'd be paralyzed without it! Bear in mind that the Government of Japan does not give you the permission to use that SIM Card for making phone calls! You'd be only allowed to use its internet feature. There were a few times that I needed to use a phone and I couldn't. Public phones are available throughout the country because unlike North America nasty, money grubbing, greedy telecommunications cannot disconnect them! So you still would be able to make a phone call but it's a bit inconvenient. 
6) Dress is very important. I hate heat and can cope with cold easily. I also hate shorts, baseball caps and short-sleeve shirt, but that's the national costume of Westerners! So, if you like to dress like that, go ahead but check the weather before you leave and take the appropriate clothing. 
7) A good camera and film recorder are both must. My camera took a few good pictures but it is old and has had an issue for the past 8 years or so! I should've replaced it or fixed it and did none. I took some good pictures but could've taken much better ones, had I had a good camera. A Clip recorder is important as well. The majority of people use their mobile phones these days. If you're happy with that and or on budget, go for it. You also can buy the best cameras in the world in Japan. However, if you do not know much about cameras, you'd need to go through lots of translation, perhaps using Google Lens, to find out about the features of the camera as the manuals are in Japanese. You might be able to find the manual in PDF format online too. 
If I remember something else, I'll update.

(Photo: This beautiful citrus tree was seen on my way to the resting place of the great Tushiro Mifune in Kanagawa. I took this photo with my Motorola g play, my second mobile phone. If an object or seen requires adjustments, a camera like that would absolutely be useless!)