It's not very elegant, but I shoot a lot from the window of a Toyota Tundra. Around farms and ranches, deer and sometimes bear are somewhat used to vehicles and if you stop easily and don't get out, they often will let you get a photo. This year, I have got photos of seven grizzly bears (not counting what I saw in Yellowstone or other parks) from the vehicle, and in the past have gotten wolves, coyotes, eagles and black bears, and gobs of elk on the rural roads around my home.
Also, driving around on rural roads often gives you an idea of where the animals are active, and you can return and perhaps move off road and set up some sort of hide in the case of deer.
I spend a lot of time gawking around boggy areas because they are havens for so many of the smaller birds and animals.
Also, I never leave the house without a decent binocular, 6 magnification is my favorite because it has so much depth of field. Look for indicators- If there are magpies bunched up, there is likely carcass or other attraction and maybe a hawk or eagle there or a coyote.
I try to always have one camera set on full automatic sitting beside set on a relatively high ISO, because its' common to have something flit out of nowhere with no time to check camera setting.