Once we found a waterbuck bull I shot by just getting down wind of him rather than just go willy nillie into the pucker brush acacia thickets. Saved us from a lot of scratches.

Giraffe bulls leave a lot to be desired and are easy to find via scent. Again same with buff and ele. Moose wallows are pretty stinky.

I try to mask my own scent when hunting such as using vanilla soaps, this acts as an attractant as do certain spices like anise, allspice and cinnimon. Peanut butter works too.