That's what I'm working on too. My favorite player in that style is Joe Pass but I haven't come close to that level of playing. Take a simple melody, learn it, figure out the harmony and build on that. I started with "Greensleeves" then went on to "Windy". Now I'm working on "All The Things You Are". There are a few good books out there, if you want to take the "show me how" road. Go to musiciansfriend.com and search on "chord melody". I've not taken that path so I can't make a recommendation.