If you are keeping a calendar worksheet for your 15 minutes a day cleaning/sorting activities, here are the current two months. Some folks like to just print one and write on it. If you want it electronically - you can create a free Google Calendar and have it send you an email or text reminder. https://calendar.google.com   

Google Keep https://keep.google.com will also provide you with a blank checklist with checkboxes and it will send you private reminders to your phone.