I'll chime in and agree - max out your IELTS first. Other options that come to mind:
1. Do a Master's/PhD
2. Learn French
3. Get a job offer (to be fair, this may be perfectly reasonable for some people, not necessarily for others).
4. Get your younger sibling (with more points) to apply to Canada, become a PR, and move here. Then you get 15 points.
5. Marry someone who has more points/will add more points to your application.