Give me there, their and they're any day! Effect and affect never fail to confuse me, so thank you so much for this. =) Hopefully I'll never mix them up again.
If you have affected something, then you have had an effect on it. I admit I have had my fair share of problems with distinguishing between the two at times, and I think that one line will finally clear it all up for me. I love lines or anything that is easy to remember to help with grammar or even other things. Good job on this. :)