Now that you have acquired a legal second citizenship, it is important to keep your documents safe. Travel with copies and keep the originals in a secure area. You also need to make sure that your certificates are deemed valid in your current place of residence (you can have them attested).
When you travel, research for some basic information in order to answer any routine questions at immigration about how you obtained citizenship etc.
If you misplace your passport or need to renew it, you can do so at the embassy closest to you.