Reddit reviews Positioning: The Battle for Your Mind

Some things to check out:

• The list mentioned in the sidebar
  
  
• This Wikiversity page for a good high-level intro
  
  
• Book: Positioning for brand strategy
  
  
• Books: Influence and Fascinate for consumer psychology concepts
  
  
• Book: The Tipping Point for big how big ideas take off
  
  
• Book: Don't Make Me Think for website usability
  
  
• Website: Hubspot marketing hubs (I haven't actually looked too much into this site, but it looks ok at first glance).
  
  These are just some specific things I've found helpful in the past, and most of them (the books) are related to specific concepts, so keep in mind that there are many other topics that you should look to other sources for. For example, for search engine optimization, there's Seomoz.org. For low-cost marketing alternatives, there's Guerrilla Marketing. For ongoing general marketing tips, there's Duct Tape Marketing or various things from Seth Godin. All things considered, I'd say you should become familiar with the high-level marketing topics (the Wikiversity page), then tackle those topics in more detail by googling around or asking for recommendations on reddit.
  
  Side note: Might not appear entirely relevant to you at this time, but it's never a bad idea to brush up on your Microsoft Excel skills. Many marketing associates (especially in industries related to taxes, etc.) have to deal with Excel a lot, and therefore can benefit from learning optimal/automated ways of doing things in Excel.

As a "helping service" provider, your costs are probably relatively low and mostly your own time.

As such, your economic success will rise and fall on your pricing and marketing.

This is a pretty good wholistic view of marketing from a customer perspective: Positioning, the battle for your mind

Once you understand what you want to be, you can then explore how to get there.