how to deal with large catch?

[jbl_91762]

So I have a strong feeling as Im gaining experience with fishing that I will land a big boy be it YT, WSB Hali etc. I have a net but should I get a gaff and use instead? Do I kill the fish before I put it on the keeper and how are you guys killing them bash skull (what do you use) or cut gill or Iki Jime? When do you bleed them and is it species dependent? Thanks for helping the new guy.