This is amazing, easily add todo notes to your Latex file while you are still working on it. They will show up as a bubble on the right side of the PDF file, with a line pointing to the actual position in the text.

Usage is as simple as that, include the package:

\usepackage{todonotes}

Add todos:

\todo{Your task}

You can download the package from here if your distribution doesn’t include it. In order to generate the stylefile, open the *.ins file in your tex-editor and typeset it, creating the *.sty file.

ps.: You might have to typeset your document twice for the line to show the actual position of the task.

pps.: If you don’t particularly like the color, open the sty-file with your tex-editor and change the color to anything you like. The commands to change can be found in the beginning of the stylefile (backgroundcolor & linecolor).