Idioms, what do they mean?

[squirell nutkin]

The road to hell is paved with good intentions. I always thought it referred to people who try to be helpful but are not. Turns out, it refers to Things that you intended to do, but never got around to doing.

Have your cake and eat it should be Eat your cake and (still) have it. You can, in a sequential way, have your cake and (then) eat it too. In fact, in order to eat your cake you have to have it in the first place. However, the same is not true of eating your cake and continuing to have it after you've eaten it.