Now that you are learning scales properly you should also make sure you train your ear too. When you are practicing a certain set of scales you should be able to imagine a good solo in your head (without holding your guitar). Then, sit down and work it out one bar at a time - this is different from jamming as you will be working out something in a very structured way. It's a great way to improve very quickly as you will learn the fretboard by ear along with the scale shapes and you will come up with much more original solos by not simply sticking basic scale runs together. When you start creating your own lead its great to mix up jamming and structured solos. Hope that helps as an add-on to the above.