I won't concentrate on scaling up your traffic. I will look at your web analytics, listen to your audience, tweak some CTAs.
Try tweaking your Conversion Rate Optimization. What language are you using? Buy now or learn more. You may want to use something more creating or appealing like 'get the perfect deals here'
Do you market to you mailing list?
If mailing list is boring, use push notificatuina to upsell whatever.
I do only 400 visitors per day but most times with 5%. No joke.
Consider what you will get if you are able to convert 5% of 12k... man..
With 12k visitors per day, I would make you between 250 sales (on awful days) and up to 600 when the digital universe is smiles on me.