Bonds are thing that are built upon, though when you find your right horse it will just click that Oh this horse likes me, and I like him/her. It took me five years and over 100 horses that I looked at before I found my girl. I went to see her twice, first time the owner had run her so hard that she was tired and didn't care about anything going on. So I went back a second time, it was fantastic, I went out to the pasture and she came over to me first, not woman that had owned her for a few years, I gave her a pat she put her nose close to my face and breathed out, I blew gently into her nostrils and then for the time in the pasture she kept her head right next to me.
That was it. Only 10 minutes and I knew I liked her and most importantly she liked me. We have had bumps along the rode, but what I found most important that has bonded us is plain ole spending time with her. In the summer when I was staying at my boarders for the day I would just go sit inside the pasture, read a book or tan (try to tan considering I am whiter than most paper

) she would graze close to me and every so often come over to see what I was doing and if I'd let her sample my book. (lol) After I decided to I wanted to loose some more weight I would jog around her pasture, my mare would get curious and watch me. Later she started to join me in our little group jogs :)
The way I bonded with my girl was just being there, grooming and just hanging out with her. She likes the relaxed atmosphere and so do I. Not every horse is the same, nor is every person. Each experience is different and each horse has his or her own way of getting to know someone. Spending time outside the training aspect of it is from what I has experienced a good way to bond with them.