* "Serializing" your thoughts. You (2013) can explain an idea that you (2014 onward) won't remember. I try to explain "gotcha" moments to myself, in language that works for me, so I won't have difficulties later on. This began in college, and developed into the blog I run today.
* Putting in your hours. I don't believe in 10k hours exactly, but practice helps. In the past decade I've written 100+ essays of 1-2k words that I wouldn't have otherwise. I can visibly see my writing improving. Take a look at the first Garfield strip: http://history.howstuffworks.com/american-history/garfield.h... or Calvin and Hobbes: http://calvinethobbes.free.fr/english/c_prem.html
* You're writing anyway. Most tech people are writing at least 1-2k words a week in email, forums, etc. anyway. You might was well capture some of that in an archived, searchable format that can benefit you with contacts and new opportunities.