after you dry each panel, just spray OCW as you are finishing up drying each panel and it'll give you some satisfaction for a while...which, is pretty hard to quantify given the amount of variables (weather, driving, garaged or not, etc.). it will be slick for a while regardless.
when i say "finishing up", it's pretty self explanatory for an ONR wash, but for a traditional wash, i mean when most of the water is gone on that panel. my particular process is to dry it with the awesome mothers towel, and then quickly hit up the vehicle with OCW and buff with a guzzler, this way you'll get any additional water that might remain but will still have a towel good enough to buff the OCW.
i've also (briefly) thought about the suggestion of polishing the car lightly after it has cured to give the opti-coat some microscopic texture, which theoretically will help your OCW bond better and last longer...but i don't care enough to worry about that.
if you wash more often than the average enthusiast, your idea of using optimum instant detailer is great. i've done that as well and it works great. after you do your ONR wash, just spray each panel with 4:1 and dry, panel by panel. it'll be nice and slick and REALLY look awesome but of course it'll be very sensitive to the environment the car sees.
and maybe get another hobby or start working out if you are that bored, haha.