I printed a two year calendar on a 4x6 index card. I found a free printable template online, so that made it easy. My printer didn't exactly cooperate, and created a large margin through 2016. Since we are nearing 2017 I decided it didn't have to be perfect.
I circled the dates of pick up in green. Basically they pick up on the second and fourth Wednesday of each month. Not hard, but still can be confusing without looking at a calendar!
I used clear packing tape to attach the calendar to the inside of the lid of the recycling container we use. The lid is usually off to the side, but close enough to take a look at. Yes, I printed my own recycling symbol awhile back too. Our recycler doesn't provide anything, but I wanted them to know this can IS recycling, not trash.
Simple, helpful, and even free!