The lock washer things, you need to get a small flathead screwdriver. Put the tip under the lock washer and tap the screwdriver. It should come up a little, rotate the screw driver under the lock washer and keep tapping it till it comes up. Keep rotating the screwdriver and keep tapping.

Worked for me. Good luck

I tried jannchrissat's solution with no luck. The plastic did not provide the leverage I needed. I was able to remove my front wheels with a vice grip and a flathead screwdriver. Use the vice grip to get a good grip on the lock washer. Then take your screwdriver and put it in the small gap in the mouth of the clamped vice grip and get it under the lock washer. Pry the washer up using the vice grip as the pivot point. This worked great and was the only way I could get it off. The first lock washer took me about 30 mins and looked destroyed when it finally came off. I kept rotating the washer to get a good grip and would pry up a little then rotate a little more and pry again. The second one popped right off (I guess it wasn't fastened as tight).
Hope this helps!