reminder pad.

if you have microsoft office ,you could use onenote, the beauty of onenote is that you can collect all sorts of things ,filetypes, images links etc.

alternatively there is evernote

https://evernote.com/evernote/

or you could use 7sticky notes this is not the same thing though ,just virtual post it notes.
but with more than the generic ones that come with windows already

7 Sticky Notes - Fun, interactive, powerful and cool Sticky Notes for your Desktop!

Stickies should do the trick for you

Stickies will appear as post-it notes on the screen and clicking on the Stickies tray icon creates a new sticky.

Main features:

• Once on screen, stickies will remain where placed until closed, even through reboots
• Stickies appearance can be customised; fonts, colours and buttons may be changed, and styles saved. Stickies can be resized.
• Stickies can store text or images
• Stickies can snap to each other and to the sides of the screen to keep them neatly lined up
• Stickies can be attached to a web site, document or folder so they only show when it's on screen
• Stickies can be transferred from one machine to another either over a TCP/IP network connection, or by using an SMTP mail server or MAPI client:
  
  • Hierarchical friends list, which may be automatically transferred from other friends
  • Play a sound file on receive
  • Signature for transmitted or emailed stickies
  • Favourite friends, and custom lists can be made
  
  
• Stickies can be hidden for a certain period, until a specified date and time, or to wake every day, week or month, to act as reminders.
• Stickies can have alarms set to ensure you notice them at a point you choose
• International language, Unicode and RTL text support
• Stickies works with Windows Vista and Windows 7
• Stickies is small and simple, it writes to a single text file, and does not alter the registry
• AD network administrators can use Group Policy to control settings
• API to allow integration with other applications
• ...and Stickies is completely free!

Starting a new line with [] adds a checkbox to the line.

ok ,the beauty of that is it will sync to a smart phone if you have one