there are quite a lot of combinations u could do like marketing and psychology, human resources and psychology, industrial relations and psychology, finance and maths, international business with food science and nutrition, statistics with maths... etc...
of course the majors u choose dun even have to compliment each other... like me.. im doing accounting and psychology which is totally unrelated.. but by doing 2 totally different things but both my interests allows me having more pathways to wat i could do when i finish...