Yo! It can be easy......!
Make up a small list of the things or "Stipulations" in reguards to what your looking for and looking to achieve after the track has been sold!
For instance I have a "Promotional Use Only" contract, which allows a client to purchase a track and use it for the period of 15 months! I charge them an affordable price...that way I'm getting paid & I'm not breaking thier pockets either! They get to use the track for Shows, their Demos, ect... I still own the rights to the track, while all they are doing is buying the right to write, record , & perform in a "Promotional" atmosphere! Believe me I get Heads that are not really that tight, but they do what to purchase tracks! After 15 months & they haven't done anything with it the track again is open, or they have the right to roll it over for another 15 months! If they were to get signed or were to get payed a substancial amount of $ for thier performances it would be considered "Non-Promotional" and we would renegotiate the terms! Also, with you owning the rights to the track still, If someone in the industry should happen to hear one of your tracks & want to purchase it!!!!!!! For some real Dough!!!!! You could sell itto them! In return you would have to supply your client with a replacement track. It also doesn't limit your chance of getting to that "Industry Level" as a producer because "That Beat Is Taken....Sorry!" Hell No!!!! More like "No Problem You Want It ....You Got it!" These are some Ideas of How you can consrtuct a custom Sound Recording Contract for your clients!!!!!
Hope that helps!!!!!!!
Peace, Love, & Hip Hop!
Flip Da SoulFisher