- Avoid looking at the solution to an exercise until you have tried for some time to solve it yourself (don't be afraid to struggle for 30 minutes).
- If possible, discuss the exercises with fellow students.
- Look over your proof attempts to check that every step looks reasonable.
In the end you might want to compare your attempt to someone else's proof. Here are some resources for that:
Sometimes I might post some solutions here (on the relevant date). There are many solutions to the exercises from Spaces here (or say, here, here or here).You can also look for more solutions on the earlier semester pages. You might find solutions to some of the exercises from the notes here (but the numbering could be different).
If you have questions about exercises the best way to get answers is to attend the exercise sessions. It is also possible to ask on Canvas.