It is personal preference, but i use the standard:
"+y
"+p
I like that this works by default and for me, it has became a 'finger macro' that i can type easily and quickly. You could assign these to something else if you like but i find this works fine as is.
A vimtip was linked in the below wiki which remaps the sequence to the following:
vmap <C-Space> "ay
nmap <C-Space> "aP
imap <C-Space> <C-o>"ap
nmap <C-c> "ayiw
vimwiki explanation: https://vim.fandom.com/wiki/Copy,_cut_and_paste
unlike most text editors, Vim distinguishes between its own registers
and the system clipboard. By default, Vim copies to, cuts to, and
pastes from its own default register, called the unnamed register ("",
also called quotequote) instead of the system clipboard.
Assuming Vim was compiled with clipboard access, it is possible to
access the "+ or "* registers, which can modify the system clipboard.
In this case, one can copy with e.g. "+y in visual mode, or
"+y{motion} in normal mode, and paste with e.g. "+p.
If your installation of Vim was not compiled with clipboard support,
you must either install a package that has clipboard support, or use
an external command such as xclip as an intermediary. See Accessing
the system clipboard for detailed information.