I took almost three months off from reading, but I'm still on track. A couple ahead, even. But that's mostly because I set a much more realistic goal of 50 this year.
I also revised some of my "mini-challenges" because my interests have shifted a bit. Back at the beginning of the year, there were some books / series I was champing at the bit to read but now I'm "Meh, I'll get to them." Forcing myself to read something I don't feel like reading never goes well, so I'm going to avoid that.