Dude that's cool... rekindling a past relationship can be awesome.. better than the first go-round. But you can't expect to get many pointers from us as we don't know you or her, or your past. I would recommend taking it a little slowly and playing it by ear. You already know you enjoy each others' company, build on that.
Are there things from your past relationship that did or didn't 'mesh' with each other? Work on doing or not doing those things. Find out where your interests lie. Both of yours. Work on that. Be spontaneous, and don't dwell on what is maybe going to happen... let the moment take you. If you're relaxed and comfortable, and she will pick up on this, things will go much smoother. Chances are you'll have a good time.
Always be yourself and keep in the back of your mind (but within reach) that she's thinking/feeling the same apprehensions and wondering what she might or might not be doing right.. and could be wanting to make things go as well as she can like you are,... e.g. asking advice on totse. <<< If she does, I'll advice her to fuck your brains out.. okay? Good luck.
-Extant