So I got the idea in my head that I am going to double major in Political Science and English and from what I have heard it is very possible and a good thing to do (especially for a law school application!).
Is anyone double majoring? How is it?
What should I do to make it quicker and easier?
Any other advice?

The fact that you are double majoring will create more lengthy graduation requirements. Also, your ability to take higher loads of credits also matters if you want to graduate in 4 years. If you notice that you've only been taking 12-15 credits, I suggest bumping that up to 17 or even 18 credits. 18 credits seems like a lot, but if you choose wisely, it is not as bad as it could be. Sometimes 3 really hard classes in the same quarter is worse than 2 hard and 2 easier classes.
Further more, try and take classes that will satisfy both GUR's and your major requirements. And lastly, I would try and stay up in Bellingham for a summer and take a couple classes. I don't know about poli sci, but english classes are always offered in the summer and if you haven't enjoyed a summer up here yet, it is really beautiful! You should do it before you are done here.
As for the easier part of you question: I don't really know what you deem as "easy." So that is hard to answer. You will have LOTS of reading for both majors, but if you like that, and can read several books at a time and be fine, then you won't have a hard time. It might be even easier for you to do that than to memorize tons of material.
The difficult thing in my opinion is if you are doing English lit, or creative writing...these have different requirements and creative writing is great, but a lot of...well....creative writing on your part at home.
Hope this helps. But, overall, if you want to double major, then DO IT! Make the most out of college and dont let brick walls stop you.. Those are for other people!