What should I prepare for a Star Wars X-Wing tournament?
UPDATE: So I finished my first tournament last Saturday (1:3 W:L, Place 9 out of 14). Here is my experience regarding the things I brought:


Too much copies of the build, three are enough (one for the TO, one for the opposite player, one backup)
More bottled water
Pain killers (lack of oxygen after the third round got me head aches)
Pen is always useful
Marked my tokens on the evening before (there is some chaos on the table sometimes and I am sure I lost 1+ tokens regardless)


Additional things I should/could have brought:


One guy broke his K-Wing, so next time I will bring glue to help out


One guy forgot his damage deck, but I think that would be too much to bring more than one for these cases (he played with an old damage deck from somebody else's collection).

Additionally, there is a good collection on tournament things on reddit:


Tournament Prep
Tournament Etiquette