I'm currently taking a class all about Creative Concepting (that's actually the name of the class too) and an article was passed along to help think about concepting. It's called The Power of Persistence for Creative Success and it helped give me some extra motivation to push through those blocks.
It has been tough to push myself to concept a new idea for a new campaign every week on top of concepting during the day, but it's been a good mental exercise. Even though I've had duds for two of the first three classes, it's challenging me more than I ever have. New methodologies, fewer limits (since these are all fake ads and no account people) and more creative freedom.
Right now I have a notebook full of ideas for each week and it's only going to be expanded upon as I'm able to push through those roadblocks even more. In fact I'm currently writing this as I'm trying to brainstorm for a campaign.