For all the people that landed, I've got a little surprise: if you want to keep track of the date when you can apply for Citizenship, you could do so on the CIC website. The thing is that the website doesn't work that fast for calculating the date if you need to enter a lot of trips outside Canada and you can't save any of it for later use.
In order to accommodate the calculation, I've made an Excel sheet! You can keep track of all your trips abroad, save it on your hard drive and see how all the trips influence your date as of when you can apply for Citizenship. Don't worry to much about if the trip is made more or less around the date 1 year before the landing (when you can starting counting towards "time spend in Canada"), I've included everything in the calculation.
Download it here!
If some Excel-savvy people find errors: let me know.