The easiest solution for you would probably be to export the contacts from one account and then add them to the other. If you've already put some contacts into the new account then you can merge the duplicates that are generated.
To export, just go to your contacts and in the More Actions dropdown select "Export...". Use the Google CSV format since you'll just be re-importing them, save to your desktop, then go to the same place in your new account and select "Import...". You may lose some information such as group membership but it's much better than having to re-enter all of your contact information.