1) Give away something for free and they will return the favor. If you are looking for ways to interact with potential customers or convert them into leads for future sales, gift them something and watch them return the favor.
2) Be persistent. No matter how long it takes to break even or establish your company successfully, make sure you do not loose any hope. Always be persistent and confident in your approach.
3) Build anticipation amongst customers. This is perhaps the most important step in marketing; creating curiosity among your target audience. Building anticipation among potential customers turns them into confirmed customers eventually.
Regardless of your best efforts, make sure you plan well and do not change your mind later. Once you get into business, there should be nothing to stop you.