OP: you've obviously gotten two major schools of thought (1) simply move saddle forward or (2) adjust the tilt. Even if you think it's a forward/rearward issue, just be sure to at least check the level to see where it's at or an obvious tilt issue. Again, in my personal experience, this is the main reason people slide forward on their saddle, but it could be the other reason, sure.
Whatever type of adjustment you do, you should do only one thing at a time and use some sort of indicator (the level for tilt, a mark on the saddle rails for the other) so you can keep track of what you're doing and go back to where you started if need-be.
Good luck. Like someone said: it's not rocket science, just work a little at a time and keep track of what you've done.