I find it convenient to remap the backtick key "`" to single-quote "'". Functionally, they are very similar. Backtick takes you to an exact mark location while single-quote simply takes you to the beginning of the marked line. I don't use the single-quote functionality much, and it's much easier to reach than backtick, so the following mapping saves some finger stretching.
nnoremap ' `
nnoremap ` '