Good programming practices.
OSA Foundation is a project to follow. They have a high-quality people on the board, as evidenced by
this post on good programming practices:

Off the top of my head, here's a quick partial list of things that I think are important:

• Continuous releases and daily builds
  
• Rather than put a bug in the bug database, first try to fix it. Don't
  code first and ask QA to find bugs.
  
• The engineer who wrote the code is mostly responsible for QA.
  
• No code is finished until the unit test is finished.
  
• Good design results from getting something going quickly, followed by
  lots of quick iteration.
  
• The best architectures evolve for a long time.
  
• Code reviews are a regular part of development.
  
• Difficult parts of code are best done by a team of two people working
  closely together.
  
• If you see a new bug while doing something else, drop everything and
  jump on the chance to fix it. It just make your life easier down the road.
  
• It is possible to eliminate all bugs from many subsystems and you should
  use techniques that make it possible, like monte carlo simulations and
  exhaustive checking code whenever possible.
  
• Complexity is your enemy -- the sooner you learn the smell of too much
  complexity, the better.
  
• Simplicity is your friend. Don't fall for a really cool fancy algorithm
  unless you know you need it.
  
• Buzzword technologies often become religious. The only thing you should
  be religious about is happy customers and they don't care about buzzwords.
  
• Don't build elaborate systems unless you know you need them.
  
• Research existing open source project to make sure the code you need
  isn't already available.
  
• Never write a slow program.
  
• By the time your project is finished your competitor's project will be
  way better than you think.
  
• Price is only one feature of software. It's often not the most important.
  From the user's perspective, simple things should be simple and complex
  things should be possible.
  
• Automate releases.
  
• Use source level debuggers.
  
• Use IDEs
  
• Don't write makefiles unless you have too.
  
• Measure then optimize.
  
• Always spend at least 10% of your time learning new things.
  
• Use multiple languages, programming environments, operating systems and
  programming methodologies until you are comfortable with them and learn
  to appreciate the benefits of different approaches.
  
• Use the best tools, even if they are expensive.
  
• Optimize variable names for maximum clarity, not minimum typing.
  
• It's OK to make mistakes. The only thing that isn't OK is to not learn
  from them.
  
• Don't leave code commented out unless it's clearly explained.
  
• Approach each piece of code you write like it's final finished code.
  Don't leave loose ends to clean up later because you'll never have time
  to clean them up.
  
• Never code an algorithm that you know won't work in the final product
  either because it won't scale, run fast enough, or will have a rare
  failure case.
  
• All successful products have a life longer than you can conceive. Files
  and processors will grow by factors of 10,000 -- make sure your design
  can accommodate change.
  
• Don't code the first algorithm that comes to mind. Try to examine all
  possible approaches and choose the best. Get someone to review your
  approach before coding.
  
• Don't put band aids on bad code, rewrite it. At first is seems hard, but
  after you've done it awhile you'll find successive rewrites go much
  faster than you thought.
  
• When you work on someone else's code, don't leave it in worse shape than
  it came to you. Ask the original author to review your change.
  
• No bug is impossible to fix.
  
• Get to be good friends with a programmer, designer, or writer who's
  better than you.