Please note: There are a variety of topics. If you do a broad search on google/your favorite search engine, you will notice several links. However, if you have a particular topic, you can also research it and build your own toolbox talk. 

http://www.cpwr.com/publications/handouts-toolbox-talks

http://safetytoolboxtopics.com/Toolbox-Talks/

http://www2.worksafebc.com/Portals/Construction/ToolboxMeetingGuides-Index.asp

https://safety.cat.com/TBTs