I'm going to disagree - putting three frameless prints side by side with a gap of about 9 inches between them can look fairly striking so long as the prints aren't too bold.
Don't be afraid of putting bright colours with bright white (white, not shitty cream or beige etc)....
Red and white is very much in vogue at the moment, as is black and white. You may try getting an artist friend to paint you some abstracts to go with your decor.