Part of the fun of being in business for someone else is attending marketing trade shows your boss paid for. If you are an entrepreneur, you say ouch to the price they want for your exhibit, and you consider the value to your business.
A good investment in the marketing of your business is most anything with the company name on it. You cannot get your name in front of too many eyes, ever. That is why you invest in some key marketing items, most of which you will use repeatedly. That is not a bad investment.
No doubt, you need a table cover with your company name and logo. Table covers bring your brand to life in the middle of a room crowded with vendors. Your logo or company name should be big enough to see across the room. Someone there looking for you and that is not an opportunity to miss.
Along the same line of marketing are floor displays and signs that explain your business to a stranger. You and your winning personality are the most important part of your display, but you cannot speak with everyone; some are curious, will take what you give and wander off. You can feel good however, that they took some of your marketing.
A popular marketing item nowadays are bags. Reusable shopping bags are useful for many things after the trade show. People will gravitate to the company that gives out useful, reusable bags at their trade show booth for the convenience of collecting all the nifty marketing materials given out at other exhibits.