So, you have no bottlenecks, no goals (performance wise), you're rather small, and all you can tell about your future is that you're adding "canned applications, along with my custom coding". Yet you ask from us suggestions that will prevent you from saying "Darn, I shoulda" in the future.
What do you expect to get? I mean, even if I said "don't smoke", it doesn't mean it's going to prevent a "darn, I shoulda" in the future. Some people smoke all their life, and never get cancer, and people get cancer who don't smoke.
Seriously, set goals, and measure your performance. Act if necessary. Magic bullets do not exist.