It’s vs. its
Wrong: Its over here.
Right: It’s over here.
It’s means “it is,” while its denotes ownership, as in “The dog? We’re looking for its owner.” They’re easy enough to keep straight. Ask yourself, “Do I mean ‘it is’ here?” If not, use its.
Alright vs. all right
Wrong: Are you feeling alright?
Right: Are you feeling all right?
Alright is a nonstandard spelling and shouldn’t be used—ever (“The Who” song, The Kids are Alright, notwithstanding). All right is the correct spelling.
There are plenty more where these came from. Stay tuned.