"better, faster, smarter", if you can measure these you can improve these. Focus on that.

- Work hard, have aggressive deadlines and get rid of the people who are being lazy. You are in business for a long time and probably your developers have become bored and run out of ideas. You need to challenge and motivate them like in the early days. - Get some smart people as advisors/consultant to help you generate innovative ideas to improve your product and define the timelines. Especially if you don't have any technically strong guys in the core team.