DH "going" first and then me... theory being dipping the cervix into the pool of sperm and sucking them up to where they need to be LOL.
That's exactly what I did too! I often O-ed hours later (manually - ) which I think really helped! Sorry if TMI!

I also dropped 18 kgs in the 12 months prior to conception - which certainly helped me. When I got pregnant I was at about 92 kgs (quite good for me!) and feeling very healthy and active.