Well my ex-brother in law was a carpet layer ( total wanker btw ) However I only helped him lay one carpet and that was quite a while ago now. Generally speaking a field I know little about.

That video is concise, informative and to the point. Those blokes really seem to know their stuff so follow their advice.

If you will be doing a lot of carpet laying I'd suggest to use only new tools. It's always better IMO.