Here are some things that might help:
- Letter from your family stating they know of your plans
- Some sort of banking or savings account that has movement. RRSPs?
- A job offer, a job search, proof of applying to jobs in Canada
- Proof that you've secured a place to live, or that you have been looking for housing
- Proof you intend to leave the country where you currently live (e.g., you're closing bank accounts, you've given notice to your landlord if you're leaving, etc.)