Example: I enjoy swimming, hiking, and canoeing; all of which influenced the trip. Is this correct? If wrong, what would be the proper way? Thanks in advance.
That looks okay to me, because the semi-colon is what can be referred to as a super-comma; it breaks the sentence up because of different points made.
I think that for the semicolon, you'd need another full sentence, as in: I enjoy swimming, hiking, and canoeing; Joe, on the other hand, enjoys nothing more than a good nap. (Not that actually I'd write it that way. I'd make it two sentences, but I _think_ that my example is grammatically correct)
Yep, it looks correct. You could even write: I enjoy swimming, hiking, and canoeing; Joe enjoys nothing more than a good nap. ---- Also, here's an example of how to use a supercomma (which was mentioned in one of the posts above): We visited Portland, Oregon; Seattle, Washington; and Bonners Ferry, Idaho.