Finish Right

At the end of every project, it's important to go through a formal Lessons Learned evaluation to allow every member of the team to learn from their experience.  Ask yourselves what you wish had been done differently -- not to assign blame, but to do it better next time.
 
The same examination may be beneficial at the end of a task.  If you had to rewrite your Recommendations document three times before your collaborators would sign it, there is probably a lesson to be learned from the experience.
 
When you identify a lesson you've learned, write it down.  The simple act of writing it will help embed it in your memory.  If possible, share it with co-workers.  The act of teaching is the best way to learn.