1) Know the qualities of the type of individual who will work well in the organisation's plans and culture before you start the hiring process
2) Don't settle - hire right the first time
3) Set SMART goals, and operate a proper CRM system for "remote" management
4) Train properly
5) Don't micro-manage unless that's the sort of individual you want (people requiring micro-management are typically not very good sale people)
6) Go to meetings with the individual and set the right examples in-meeting
7) Ensure admin is completed accurately (should form part of the SMART goals)
8) Set realistic targets and incentivise accordingly
9) Have scheduled meetings to discuss each new prospect, the previous week's activities, and to ensure that plans are being stuck to (be prepared to revisit plans, but not on a whim. Revisit quarterly imo)
10) Ensure that you have targets for conversion rates (calls, meetings, follow-ups etc) and that you are able to monitor these properly. And run A/B experiments on value propositions as well to determine which work and which don't. Don't be too frigid with this sort of thing, especially for cold calls.
11) Know your own sales cycle beforehand
12) Ensure that systems and support around the sales staff are 100% - don't leave them with broken systems and zero support - you'll lose good staff very quickly that way.
13) Ensure that honesty forms a part of their sales mantra - the last thing you want is a bullschitter - they have quick wins, but you'll sacrifice brand value and recurring revenue. It's simply not worth it.
14) Ensure that as management you continue to evolve your product and your business. Good sales people get bored too quickly when things become monotonous. Keep them feeling like they're a part of the business' success, and involve them in certain brand and product evolution discussions.
15) Don't mix up business development, sales, and account management. Many small companies try to blur the lines there to save costs, and it always backfires. You'll find a super salesman may not be the best account manager - be prepared to invest in this depending on your business and product range.
16) Make their life easy - plan properly, operate a solid business, give them the correct tools to make them successful, invest in training, let their personalities shine, ensure they're properly informed, keep them honest, incentivise properly, and don't EVER let them own the customer to an extent that if they left, so would your clients. Stay actively involved.
Much more advice available, but in general those are good pointers in my experience with sales staff to get you on the right track.