Whatever you want to suggest, just be sure that many people can done it in a weekend. If you're not totally sure about it, try to find something more suitable, maybe a specific "route", like a "Getting Started" tutorial, or similar.
All you have to know is that the list is divided into Categories. Every category has one or more activities inside of it. If it can be useful, a category can contain more subcategories.
#### Category Name
- **_Activity_**: *activity description*
- **_Activity2_**: *activity2 description*
#### Category2 Name
- **Subcategory Name**
- **_Activity_**: *activity description*
- **_Activity2_**: *activity2 description*
So:
- the Category Name will be an header (H4);
- the Subcategory Name, if present, will be bold;
- the Activity name will be both bold and italic;
- the activity description will be italic;
- there will be a whiteline between two categories;
Also, if you're creating a new category, don't forget to add it to index!
Another suggestion: make small suggestions, not big ones.
All you will have to do is to make a pull request for new item/items. If the category for your item does not exist, feel free to suggest a new one. The same goes for subcategories. Just be compliant with the given rules.
Thank you! :)