0. Plan before you code. Document everything. You won't remember either your idea or those clever implementations next week (or next month, or next year...).

1. Don't hack your way through, unless that's what you intend to do. Name your variables, functions etc. neatly: autocomplete exists!
Protip: Sometimes you want to check a quick language feature or a piece of code from one of your modules. Resist the urge to quickly hack in the test into your actual project. Maintain a separate file where you can quickly type in and check what you're looking for without hacking on your project (For example, in Python, you can open a new terminal or IDLE window for those quick tests).

2. Keep a quiet environment where you can focus. Recommend listening to something while coding (my latest fad is on asoftmurmur.com). Don't let anything distract you and throw your contextual awareness out of whack.

3. Rubber ducks work. Really. Talking out a complex piece of logic, or that regex or SQL query aids your mind greatly in grasping the concept and clearing the idea. Bounce off code and ideas with a friend or colleague to catch errors and oversights faster. Read more here: https://en.wikipedia.org/wiki/...

4. Since everyone else is saying this (and because it merits saying), USE VERSION CONTROL. Singular most important thing to software development aside from planning and documenting.

5. Remember to flout all of the above once in a while and just make a mess of a project where you have fun throwing everything around all over the place. You'll make mistakes that you never thought were possible by someone of your caliber :) That's how you learn.

Have fun, keep learning!

Some words of wisdom passed on by our Scrum.

1. I am responsible for setting boundaries. Work time, sleep time, family time, me time. If I don't set them properly, things WILL get unbalanced very quickly. (And I would add, burnout will follow closely).

2. Being productive isn't about doing more and more in less time. It's about doing only the most important things well, and either saying no to the other things, or finding another way to get them done. (Prioritize!)

3. I can't win (let alone run) a marathon by thinking of it as a 26 mile long sprint, or a week as a five day sprint. (Eat a digital elephant a byte at a time).

4. Loved ones are good judges of when things are in and out of balance.

5. Taking time off is essential. Vacations, yes, but also nights and weekends. (Or you WILL burn out and hate what you do).

Comments in () are mine.