Because I have several friends who really need some anatomy lessons. This isn't the prettiest tutorial ever, but it gets the idea across.
I will re-type the text here for those who can't read my handwriting, with a few added things:
Note that I am using my own fursona's legs as a base. Slight differences in anatomy may apply depending on the age, gender, high, weight, species, etc. of your muse!
This line should not go back UP if the muse is standing normally. This is the anthro equivalent of squatting. DO NOT make this mistake!
It helps me to think of anthro legs as regular legs with short second sections, and long feet to make up for it.
One of the most important things to keep in mind when trying to achieve correct anatomy is SYMMETRY. Both legs should be the exact same, meaning each section of one leg should match the corresponding sections of the other leg. Ex: One foot shouldn't be longer or shorter than the other.
Unless one foot is behind the other, they should touch the ground in the same place. One should not be higher than the other. You may need to draw a horizontal line as a guide for where the ground is.
DO NOT change the LENGTH of anything to make both feet touch the ground evenly! Instead, adjust an angle or two until it works. If working digitally, rotating the sketch can also be a big help.
Remember: There is no such thing as a perfect tutorial with all the answers. Make sure you look at several. I'm still learning just like you are!
If you have any questions or think I should add more tips/info, let me know.