When it is announced that tickets will go on sale, make sure you know what day and time they go on sale in your area. Because the tickets will sell fast, make sure that you are prepared ahead of time: I would recommend setting up an account (or two) on the ticket sale website, downloading and setting up applications on any devices you have available, and having your devices logged into the site and ready to go.
Be sure to have made arrangements ahead of time. For example, plan transportation to the event, where you are going to stay, or even what day you want to arrive.
Read the concert venue rules and policies because these will help you to understand what is allowed to be brought into the stadium. Also make sure to read about when merchandise sales begin or when the parking and stadium gates open.
If the show was like “Love Yourself: Speak Yourself” and held in outside venues, prepare for whatever weather you might encounter. Bring a rain poncho (I got mine at Target and it wasn’t expensive) and make sure to dress according to the temperature.
Remember that you shouldn’t pack too much for the show. Only bring what is necessary such as: a clear bag (that falls within required measurements), snacks, your phone and phone charger, earplugs, money, and whatever else you think you would need.
Try to arrive early to get better parking so that you have more time to get ready. I also recommend arriving earlier because if you’re interested in buying merchandise you can get a better place in line.
If you are planning on buying the BTS lightstick make sure to download the app on your phone and bring 3 AAA batteries.
You can film and take pictures (with your phone, not with a video camera or DSLR), but try to not spend all your time on that and enjoy the experience.
Follow them on Twitter. You’ll get the best tips from other fans such as the best gates to enter, shortest lines for food or bathroom, etc.