I put them in the bin. Lancets I put in a sealed container and put that in the bin. I use Unistix, though, in which the needle completely retracts (I even rubbed a used one across my cheek the other day, just to be sure). If they were actual needles I would probably make sure I had a sharps bin. I don't have a blood borne disease, but that isn't really the point - it's the distress caused to the bin man from a sharps injury and not knowing whether or not it was contaminated. But test strips are not a risk and I draw the line at making any special arrangements for them (having said that, they generally end up in the bottom of my handbag, and get dumped every few days!)
Type 2 on Metformin, diagnosed Jan 2013, ultra low carber, Hba1C at diagnosis 8% (11mmol), now between 5 and 6 mmol. 13kg lost so far