One method is to offer motivational quotes that are geared toward salespeople. This allows them to stir up the things that they want for themselves as they read these. What I recommend is sending out one quote every morning. As an added bonus, you will be creating an atmosphere of motivaation within the company, or at least within the sales team.
I have compiled an eBook of 120 motivational quotes that you can drip to your sales team. If you are interested, you can find resource here: http://lp.blue-phoenix.net/120-motivational-quotes-for-sales-team
Cheers!
~Joshua