Go in the menu bar at the top of the screen and then Applications
then look alphabetically for Stickies.
Once you double click on Stickies, a blank sticky note will come up that you can type your short list or long list of reminders to. Other options within Stickies, mainly located within File, Note and Color on the top menu bar are to add a New Note, make each note a Floating Window and/or Translucent Window, and to change the color of each note.
1 thing I do is I make sure that Stickies opens up when I login to my computer each time. You can do this by 2-finger clicking on the Stickies icon in the dock,
then hovering over Options and then clicking once on Open at Login.