the only advice i can give, not knowing very much about this myself, is to really try sing along with the guitar in your head at the same time as you play....
no matter what you play your going to be executing some pattern or combination of smaller patterns that your brain has absorbed through years of playing. so the thing is to just try let em flow out... in the most musical way you can... let your mind create and hope your fingers keep up
thats what i do anyway..... just play along to anything.. pop .. rock ... jazz..... rap.... classical.... sometimes i play the vocal line most of teh time i try invent new lines... just playing on the guitar what i sing in my head......
a great way to learn unusual patterns that sound 'organic' and improvised when you play them is to play along to pop music and try play the vocal line... or if your cray enough to do it... i once tried to read poetry with my guitar.... just read it in your head and try get the rythm of teh words on teh
finger board.. even people speaking.. speach has a natural rhythm... if you get a few seconds of speach
... take my opening line for example has two commas in it.... if you say that to yourself get teh rhythm .... and then learn to play that rhythm on the guitar.... tehn you have with two short phrases and a long phrase... as a very basic idea ..... for teh first short phrase you can maybe play a scale up, teh second you can play around where you are and for the long phrase you can scale down ... if you put that over some chords it wouls sound pretty good and improvised....
anyway thats just what i do... and it works ... but im probably doenst work for everyone....
