Most business are developed on the spot because a connection has been made between two parties to provide products or services. If you are the person on the side who is providing the service and are not incorporated or registered as a business, the meetings you had, travels you are taking and additional costs can be used as an expense against the revenues you will earn from that contract.
Before I talk more about revenues and expense, the definition of these are as follows:
Expense is something you incur to earn income from your business activities.
Revenue is income earned from business activities regardless of if you have received the amount for payment.
To you as a pre-business owner, you can deduct the expenses you get from things like meetings, events, cell phone charges, travel, and anything else that got you to that point of contract job. But there is a catch for some of it!