How can i make my room more bohemian?

i dont want to spend too much money. probably $50 or $100 at the very most. hot pink bedding with polka-dots, and a black shag rug. i have huge closets that slide open that are just white... i have nothing on them, two windows. for what i have to use.. ive travelled a lot - especially in eastern asia - so i have a lot of oriental stuff. ive also been to a lot of western europe and i have lots of stuff from south america that i got from my mom so.. theres that. also, my bed doesnt have a headboard so.. any suggestions for that? i like my room to be really personal (pictures, etc.) and also really unique. i like to take vintage stuff and make it more modern with color and things. any ways i can make it more bohemian? thanks(: