Let one credit card report a small balance (I find I get the most points when my credit card reports 1% (and lose 3 points when it reports 3%)
As the inquiries age your score will go up.....Sometimes at the 6 month mark people see a couple of points......
Also I wouldn't apply for anything else...if you maintain your existing credit cards in time they will raise your limits and give you more available credit that way instead of obtaining more cards.