...putting things into your task list should not become another task
Using Glista should be quite self explainatory: Just launch Glista, and type your tasks into the text box at the bottom of the Window. Click on the checkbox next to any to-do item in the list to mark it as done. You can also remove tasks or clear out done tasks using the toolbar buttons.
If you want, you can organize your tasks into categories. In order to add the task "Water the plants" into the category "Home" (which may or may not already exist), type the following into the text box at the bottom of the window:
Once you have categories created, you can also drag and drop items between categories (and into the top level).
Once you've created an item in your to-do list, you can add notes to it. This is done by selecting the item and clicking the "Note" button in the toolbar, or by double-clicking an item.
This will display a panel at the bottom of the list, where you can type in any additional information related to the selected task.
Do the same to view any existing notes. You can know an item has a note attached by the "note" icon next to it.