Pretty sure most of you already know this but for those who don't: you have two clipboards in Linux. One is the traditional clipboard where you copy with control c and paste with control v. The other one is when you highlight text and use the mouse middle click to paste text.
More details here.
For copying from Tmux, I recommend tmux-yank. There are also multiple plugins allowing you to copy predefined set of text types (IP adresses, URLs, etc…). I'm currently using tmux-thumbs. Note that you have to set custom command in tmux-thums to actually copy the text to xclip or whatever you are using. example in my dotfiles
I have tmux-thumbs, but only been able to use it a few times. Apparently most of what I need to copy is not ip's and URLs. But this tmux-yank looks like what I'm looking for. I'll give it a try. Thanks.