Once the AWB goes (and, as pointed out, this is not a forgone conclusion), I think that we should go after the prohibition on "kitchen-table" dealers. The whole concept of the FFL didn't exist prior to 1968 - any adult (21 at the time) could order anything via the mails. At the very least (assuming that we can't repeal the FFL completely, which is likely the case), ordinary citizens should be able to do what they did prior to Clinton - pay a nominal fee to get checked out and licensed, and to not have to work through overcharging dealers.
Nationwide CCH is a fine idea - but the NY, CA, NJ and IL delegations will stop it. However, we can make it almost defacto by getting a few more states into the "shall-issue" camp and working on reciprocity between the states. Short of that, getting a FL non-resident permit is the closest thing to a national CCH that there currently is.
I wouldn't mind seeing silencers legalized. Surely, we can find some well-known politician or comedian to mock the fact that the antis scream like Hell about all of the noise at shooting ranges (and work to close them down), while simultaneously not allowing guns to be threaded to accept silencers and taxing silencers like crazy.