avoid these, unless you're an expert
For identification beginners, or intermediate folks, we strongly suggest you avoid the following genera:
Amanita (mushrooms with white gills, a skirt or ring on the stem and a bulbous or sack like base called a volva), Chlorophyllum (green gills and spores, commonly found in fields), Cortinarius (will contain a fibrous cortina attaching the cap edges to the stipe in young specimens, these are often confused with Blewits [Clitocybe nuda]), Gyromitra sp. (which look like little brains and are considered one of the morel 'look-a-likes'). Omphalotus sp. (the Jack-o-lantern mushrooms are considered the closest look-a-like to Cantharellus [chanterelles]). There are many more that could make this list, but these are some of the most common.
And of course, don't eat ANYTHING unless you are 100% certain of it's identification.