To be grammatically correct, items in a list should be parallel in construct; that is, they must be expressed in similar fashion.
The list below has items that are not parallel:
Participants will learn several skills in the workshop:
- How to overcome writer's block
- A systematic writing process
- Planning the written document
The list below has the same items in parallel construct:
Participants will learn several skills in the workshop:
- Overcoming writer's block
- Using a systematic writing process
- Planning the written document
or
Participants will learn several skills in the workshop:
- How to overcome writer's block
- How to use a systematic writing process
- How to plan the written document
Always begin items in a list with the same type of word (noun, adjective, verb, etc.) to achieve parallelism.