One method I use, mostly with Playtech casinos, is to note what my comps points starts at. If my
WR is $3000, that means I have to earn 300 points if I get 1 point for every $10 wagered. Then If my comps says e.g. 50 at start, I'll have to end at 350/351 points at least, to be sure
WR has been met.