There are a ton of different ways you can go about getting sustain.... Compression pedals, high output pickups with overdrive or distortion pedals, high gain amps, sustainers, E-Bows.... there are tons of ways to get sustain... I suggest researching those first... use the handy-dandy search engine up at the top and search for those things... or just simply search for sustain... this has been a topic that's been ran over many times in the past and there's tons of info in the archives about it... good hunting.