We all need reminders. Whether it’s picking up groceries, calling Mom, or finishing up that big project at work — life gets busy. Thankfully, if you’re a Mac user, you have a simple and fast solution that’s already built-in. It’s called Stickies, and it might just become your new favorite productivity buddy. Stickies for Mac is a charmingly simple app. It looks like digital sticky notes — just like the ones you used to slap on your monitor — but smarter and easier to manage. Let...