Currently in college and recently started approaching. I am pretty confident when it's somewhere where we are sitting / waiting like if in line at the book store or something. But if I'm walking across campus I have no idea what to say.

Normally I just say hello and introduce myself if it's in a seated/waiting area since you can gauge some sort of interest. Any advice would be appreciated.

Honestly I'm not even approaching with just seduction in mind. I'm a transfer from community college so figured worst casenario I could build my social circle.