Thanks Aurorap. I made a cube and extruded to create the tree trunks and limbs. As for the leaves though, I created particles and then modeled a some leaves and then replaced the particles with the leaves. Particles>Instancer (Replacement). I use a specific pattern though to get that look but some secrets I like to keep for myself . Just play around with it and eventually you WILL get a decent looking tree too. I'm still tweaking mine and trying to make it even more efficient for rendering LOTS of trees.

Hope that helps you some.