How do I maximize the deductions for my side gigs?

I have a foreign language teaching side gig (travel to a school once a week) as well a farmers market side gig. How can I maximize my deductions?

 

-The farmer's market side gig is a registered business, where as the teaching side gig is not. 

-Both incur traveling costs. For the registered business, I think I can add them with the profits. How can I add these for the teaching business?

-What are some steps to maximize my deductions for both gigs?

 

Thank you