This is how I got started with it, it makes review so much faster and easier. It's truly enjoyable.
https://sasquatchbioacoustic.blogspot.com/2011/10/using-audacity-spectrograms-to-review.html
I've of course tailored it for my uses over time. For instance, I think I zoom in more than he suggests, necessary to catch more distant or soft sounds.
I record overnight, approximately 10 pm to 6 am. This works well for local drops and if I can find likely areas when traveling. Sometimes I will leave a device for multiple days if I need to. I feel that night recording rules out some other wildlife and potential human sounds, and it's when hairy folks are more active. Of course, depending on the area, day time may be as productive.
One has to listen to a lot of stuff, there's no way around it. You'll have to learn your areas' typical birds, canids, traffic, etc. Now I can scan files pretty quickly and dismiss a lot, saving just shorter clips. I include approximate time in the metadata area on those. I save by date and possible sound, like whoop or bang, etc. when I can.
This thread and Redbone are helpful, too.
https://bigfootforums.com/topic/57428-a-place-to-share-audio-files/
Back to topic, cool research video!