I'd suggest joining the ABA and doing the breastfeeding education class (you can find details on the website)
You might also find it helpful to talk to an LC or a breastfeeding counsellor - you can go along to you rlocal ABA group meeting to see one - about what happened last time and what you might like to do differfently this time. Some women also find writing a breastfeeding plan helpful.

Good luck!