An alternative that often proves successful is to partner with someone that possess the talents that you feel you lack in. If you are stronger in marketing, find someone who understands and gets the sales process. If you are better at sales find someone that can help you strengthen the message, create marketing materials that sell and give you tactics and ideas. If you don't work in a company that has both departments and you are working solo you can do this by creating a partnership , subcontracting, or hiring in that talent. Remember the key to success in marketing and in sales is balance!