Lately I have found when I am working on various client computers, they are using the 'sticky notes' that comes with windows. Although this may work for what you had intended it to--keep a reminder handy, it really was never intended to be used as something you keep constantly stuck to your screen. It was initially set up to be used as brief reminders of tasks to be done while you are sitting at your computer working away throughout the day. By the end of the day all the sticky notes should be dealt with.
If you were intended to use the note for more permanent features like something that will not happen until next week or next month then you probably want to look at other options. As well, you may not always be sitting in front of your computer but you always have your phone with you, or your tablet...
This is where Evernote Shines. It is a free app that is available for all formats, Windows/Mac, Iphone, Android Phone. They do offer a pro version which essentially gives you more 'cloud space' and offline sync as well as numerous other features but initially you can start off using it for free. Depending on how much you use it, you can then decide if you want to upgrade. The cost of upgrade is a mere $5/month or $45 for the entire year.
On your phone, you can start a new note and click on the camera and take a picture. It will automatically add the location and time so you only need to add what it is you are taking the picture of for your own reference. You can also turn on the microphone and take dictation notes. I use it when I'm shopping to get comparative prices or when I want to get more information. Since the notes are immediately synced to your desktop when you get home you can continue your research from there.
You can download the program through this link which is provided as my friend! Once you have created your free account and have fallen in love with the program you can also send a reciprocal link to your friends and get them to sign up. By doing so it will entitle you to points that can be used for a free month of premium or many other things.
Do yourself a favour and give this program a try.. you will be glad you did!