Lower the front of the trailer all the way. Block under transom. Raise front of trailer. Block under keel. Move trailer forward. Jack up bow of boat and block again. Repeat until trailer is out. Block boat with jack stands to be safe.
This one works good
http://www.marinedeal.com/product_p/jfp-180bb.htm?gclid=CjwKEAjw8da8BRDssvyH8uPEgnoSJABJmwYo539c9ljKNgzpYvu-tOIpbV9CkPujk5LKHQlqAmlT_BoCw_Lw_wcB
Right cheer
http://fishingandhuntingusa.com/big-weenie-replacement-pins-for-stinky-stinky-cut-bait-rigs/
I think they suck and use toothpicks after breaking the pins