just like any sport - for live betting, if the current score isn't indicative of how the teams are playing (i.e. fluke plays that turned into points) then play the side which gives you value. eye test is big for me. of course things like injuries, specific matchups exploitation, and momentum key too. i don't typically like betting CFL pre-game until week 3 or 4, need to get a feel for each team after all the player turnover from season to season