If you actually did used to hae mojo

then it is all about numbers to get you back into the swing. Could do a lot of approaches and soon you'll be back to natural.
OR If you are just going out by yourself or perhaps with a few male mates, then I would suggest going down the preselection route. Get chatting to some girls, ask them to join you/and your mates on a night out.
This gets you back to talking with girls and the theory is that when you are seen with girls, girls become more attarcted to you etc etc
It is easiest to just make 'friends' with a group of females before you move onto anything else. It makes things so so sob much easier.
Read up if you havn't already, preselection it is heavily promoted through Pick-Up.
Good Luck