scott keyes has revealed his savvy secrets so you too can explore the world without falling into the ticket traps .
the think progress reporter reveals his travel hacks in his ebooks how to fly for free and how to find cheap flights .
he only sign up for cards with high sign-up bonuses and relatively low spending thresholds necessary to get those .
for example , a card he just got gave 50,000 bonus points for spending $ three months .