How to make RC's work?

I had a dream last night where I did my first reality check in my dream. I was looking out the window of my house when the house suddenly began to start moving. I thought "Am I dreaming?" and did the finger-through-hand RC. It failed, so I continued to go with the flow. My sub-conscious expects it to not work, so that's what happens. How can I get them to work?

Expect them to work. Know that they'll work. If you doubt that they'll work, then they very well may not.

You may also want to try a different RC, such as the nose one. Certain reality checks may not work for certain people, which may be the case for you if the hand RC never works. If it only fails one time, it is likely just a fluke. :)