Google Sheets beat Microsoft to the punch and introduced a Checkbox as one of the Data Validation options. You can go to Insert > Checkbox to quickly create one, and you can customize it by going to Data > Data Validation. I've updated most of the Google Sheets versions of my checklists to use that feature. I hope Excel gets smart and introduces a similar feature some day.
Checklist 3: Analyzing Your Membership Numbers : Your business success depends on knowing your numbers. They can help you identify whether your customers love your product or not. Numbers allow you to find room for improvement and growth. Which is exactly why we created this checklist that will show you how to do a proper analysis of your membership site.
The Impact Radius platform enables merchants to accurately track all conversion events to maximize the return on ad-spend across digital, mobile (including all mobile web and in-app events) and offline channels, run reports to view activity and optimize offers, negotiate and execute electronic contracts, upload and host ad-creative, and automate payment to partners.
Solid and Flexible Product Navigation: this is a subject that could go on for ever. Our recommendation is that you look at new ways to extend product and site navigation based on current user actions and possibly experiments you run with users. If you don’t currently have a search feature, ask some users whether it would be a substantial gain to have one. Look at different ways to categorize product and build new filters. Then look at how they get used, and make further changes based on those results. You may end of up with something that not only makes it easier for your customers to find the products they are looking for, but a significant differentiation over your competition.
^ Bergs, J; Hellings, J; Cleemput, I; Zurel, Ö; De Troyer, V; Van Hiel, M; Demeere, JL; Claeys, D; Vandijck, D (Feb 2014). "Systematic review and meta-analysis of the effect of the World Health Organization surgical safety checklist on postoperative complications". The British Journal of Surgery. 101 (3): 150–8. doi:10.1002/bjs.9381. PMID 24469615.