updating session variable on every page load

Hi,NOTE: version 8.0There's a session variable I'd like to update on every single non-admin webpage load. (It's okay if the session variable is updated on an admin webpage load ... but it doesn't need to be.)Which handler would you recommend for that? Many of these handlers only run under specific conditions ... I'm not sure which handler would run on every webpage load? I tried to add the session update code to CMSModuleHandler's init() method ... but it causes an error, I'm guessing the session isn't set up yet? Thanks, Rita.