you are a business student, maybe you graduated already. you are an engineer, or anything else. but you don´t have any business ideas. BUT you want to start with founding a business.
No worries, what you can do is visiting exhibitions of design students!
i visited one on friday. and it was really a great experience. there were about 15 projects starting from cars that use solar energy, sail boats using the technology of airplanes onto condoms with graphics on it.
as i would say, out of the 15 ideas 10 projects provide a solid basis for founding a business. ok, i have to deduct five more projects since they are already realised by establishes players. E.g. VW was quite involved in some of the projects.
So if you don´t have any idea yet, just visit an exhibition of design students! get in contact with them, ask them about their projects! since they have to do many projects during their studies, there are a hell of a lot business ideas!
my personal experience was that design students just think in terms of projects. if one is completed, they just start the next one. therefore, meet them and convince them to realise this wonderful ideas!
hopefully one very talented designer is convinced by now to start with his amzing idea!!! 
I find it very nice, small but perfect to work, from home and while travelling. Which one did …