Newbie in Coffee Business.. needs help!

[coffeegirl01]

Hi everyone! I just got my first 5 coffee vending machines :-D
It's doing great but since I'm a newbie in this kind of business.. can anyone give me tips on how I can boost income?

I'd be glad to hear from anyone...

Thanks to all!

 

[NW JAVA]

What machines did you get? Please