Extending your company to cover international markets would definitely be effective in increasing your sales. However, there should be enough confidence on your products and services before you could continue to do so. An article from Anita Campbell's site about how the micro-multinational company, Bluewater LLC, started from scratch and then proceeded on capturing the global market could provide a few pointers which I have enumerated below on how to expand to the international scene.
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go to the market and don't wait for the market to go to you