Something really simple, but needed to be done was clean/lube the chain and wash my bikes. I'd never done it before, but the LBS gave me a lesson and sold me some stuff to do it.

4 hours later, I have several clean bikes. Yes. I am that slow and my bikes were far dirtier than I ever thought, especially my MTB.

It's amazing that the time spent cleaning and polishing bonds you closer to your bike. I won't be so nervous to do this now.