Get a copy of Divorce Remedy, there are plenty of good tips.
He will undoubtedly complain that there are things he does not like about you. Listen. Say two words. "I understand." Nothing else.
Don't tell him you love him...he already knows that.
I got a book that has helped me tremendously. It is called The Power of a Praying Wife by Stormie O'Martian. It comes with a workbook, and teaches prayer specifically for your sitch. If you have any faith in God, get it, and have a Bible and notebook handy. I have been working through this one for a few weeks, and every prayer has been answered. It has given me the inner peace that I have been searching for my entire life, and has really helped w/ my H.
Im still standin better than I ever did looking like a true survivor feeling like a little kid Im still standin after all this time and Im picking up the pieces of my life without you on my mind..