You're probably mostly starting from scratch and will need to build traffic the way you did the first time.
If there are sites that used to link to your old URL, you may want to contact the content managers of those sites and let them know about the updated info.
Also, depending on how much time you want to put into it, get out there and be social using the new URL - contribute to discourse on related blogs and sites, make sure all your related social media accounts are updated with the current info and actively use them.