How to write better

I’m a leftie. All my life, my handwriting has sucked. I’m probably too old to fix it, but I’d like to start working on fixing my penmanship. Can anyone recommend a good way to learn how to improve the mechanics of 30 years of incorrect hand positioning in writing? What can I do to improve the quality of my lettering?

[tags]How do I improve my penmanship?[/tags]