This list is ongoing. Please feel free to suggest links or disagree with links that are included in the comments.

Chemical Safety:

• Health Canada: Use household chemicals safely
• Sodium hypochlorite (bleach) compatibility chart [PDF]

Electrical Safety:

• BC Hydro: At-home electrical safety tips
• Electrical Safety Authority: Indoor Safety
• NFPA: Electrical Safety in the Home
• Canadian Center for Occupational Health and Safety: Electrical Safety - Basic Information

General:

• A reminder to ensure you check the limitations of your tools. Otherwise you could end up with misleading results.