Always be polite
Traveling can be exhausting sometimes and you probably would not feel in a good mood sometimes. But it helps to always be polite with whoever you interact with. May it be the flight attendant or the person at the front desk.
Source: BestLife
You’d be surprised how much being polite and respectful can get you. Some people get bumped up to first class while some get room upgrades. The world can open up to you if you give off a good vibe.