I absolutely agree with you. I have used this method in mathematics — did as many questions as possible. I can assure you in the effectiveness of this tactic as long as you've got consistency. When it comes to real success, that is the key.
What I did and doing currently, is start work at a...
Wikipedia is good for people who want to just get an idea about one fact or another. However, it's useless to people who are studying a subject in depth. This is because anyone with a Wikipedia account can alter the information. Therefore it is an unreliable source.