Dave. You don’t change your needle every time? Please don’t ever darken our door again, people like you aren’t welcome here. 
Seriously though, as someone who routinely changes their lancet every bank holiday as that at least guarantees it get changed a few times a year, I know exactly where you’re coming from! Take a look at Tim & I revealing our bad habits (they’re pretty similar to yours, especially mine!) http://www.shootuporputup.co.uk/2011/02/video-blog-bad-habits/ . There’s a few more bad habits here – http://www.shootuporputup.co.uk/2009/08/good-diabetic-bad-diabetic/
I grew up in the days of lines and frees, but DAFNE does build on that quite a lot. It’s a bit like being taught how to actually drive the car you’ve been bumping along in for the last few decades, it does make the journey a lot smoother. I’d say it’s worth a week off work.