i think it's great that you are proactive in furthering your career and capabilities. if you are thinking of a sales career, what you can do to jumpstart is probably gain more financial knowledge - understand basic finance, read annual reports, balance sheets, net present value etc. all these can actually help you put together a stronger proposal where you focus on return on investments, total cost of ownership etc rather than just product features.

pretty much, it depends on where you are right now and where you want to be. if you have a basic degree, you can work towards a advanced degree - be it a Masters, CFA or MBA. this can help to position yourself for more managerial roles. talk to more people in your target career industry to have more insights. basically, talk to more people across diff industries as well. you will find that you understand a lot more from diff perspectives and in the process you are also networking.
basically, if you are thinking through your actions, you should be fine. As i said before, nothing beats hard (sometimes smart) work, right attitude and EQ, except maybe a ridiculously rich uncle who names you as a beneficiary...