Day 1
Good, put your key in your ice cube holder, fill all the slots up with water and pop them in the freezer.
Now get your paper and pen, draw a table with two columns. The first column heading is "Days" and you are going to write Day 1, Day 2, Day 3 etc until you reach Day 32.
The second column will be blank and you will put a tick in it if you pass a task and cross if you fail. Each tick will win you one ice cube a day. If it's a task that is to be competed daily and you originally ticked it, you will put a line through that day so you know that you no longer have a right to suck an ice cube for that day.