Before going, we read many other blogs and looked up various items that we would need when we went on our trip.
One thing we found that we should pack as it was not as readily available in Korea as it is here in Canada is deodorant. If we did find some in Korea it would be quite expensive.
We also found out to bring our favorite toothpastes, shampoos, soaps, plug converters, Tylenol or Advil, any prescription drugs, warm clothes as it is cool in the nighttime and cool clothes since it's the opposite in the day time, towels (the ones in Korea are small) and comfortable shoes. These were the main things we focused on and of course the other extras we would need, but we made sure we packed plenty of the above.
Table Etiquette includes things like wait to be seated, the eldest are served first, never point with chopsticks, do not cross chopsticks, try a little bit of everything, refuse first offer of 2nd helpings, finish everything on point, and to signify that you are done your meal place chopsticks on the chopstick holder.
When it comes to things like meeting etiquette the main thing we realized was that we are to wait to be introduced to a group, and upon leaving bow to everyone individually and be sure to say goodbye.
the following link is where we found this information about etiquette and it was very helpful!