Quote Originally Posted by bouncybouncy
start small...get comfy...go a bit bigger!

i do the compress fork then lift as well...
compress...rock back with bike while lifting the front wheel over or on the TOP of the log..then rock back forward (gently) to lift the rear wheel over the log. i cannot technically do a bunny hop (which is the above described whilst getting the wheels off the ground) but i do get enough umphf to get over most logs! the ones that get me are big enough to get the chainring so it is best i clip out for those anyways
remember to have pedals level as well so they do not hit...try to pedal as you go over the log in order to increase umphf power....i usually set up my right foot (dominant power leg) to be around 1-2 o'clock position on the front wheel lift and push on the pedal as i am going over the log.
Excellent....this is the text book log riding! Pre-load, power stroke and unweighting the bike as you go over the log.

Here is a nice little video.....

http://www.dirtcamp.com/video_tips.shtml

Just click on Body Control.