first off, ololiuqui is perhaps the psychedelic that i have consumed the most often (not counting DXM).
in my experience, its always taken doses in the hundreds with ololiuqui. i think the highest i've ever taken it is ~500 seeds, which was too much at the time (though in a different mindset it would have been fine). if you've tripped a decent number of times in the past then i would start with all 100. 100 decently fresh seeds is enough for me to reach a ++, maybe a +++.
in me, rivea produces the cleanest feeling trips (both mentally and physically) of any lysergamide containing seed. i will trip way harder on hawaiian baby woodrose, but feel that my ololiuqui experiences have been over all more enjoyable.
oh, and this stuff mixes wonderfully with wild dagga, blue lotus, and marijuana. i used to get wild dagga, blue lotus resin, and ololiuqui from the same vendor and used the combination of all four of these on many of my rivea trips.
i usually drink green tea when i use LSA, to combat the vasoconstriction (constriction of veins/blood vessels, lessening blood flow to the extremeties). i used to brew my own from tea bags, but arizona green tea (or the black and white iced tea, in the 99c cans, if you can find them.

) works just fine.
also, i know this sounds cliche, but it really is true--LSA is not the type of trip that will be fulfilling if you spend the whole time in your bedroom. go exploring! i'm not sure if this is because a specific mental effect of the drug, if its because of a spiritual aspect of the drug, or if its due to the vasoconstriction (moving around will help get your blood flowing), but everyone that i've done the stuff with agrees with me.