Contracting / Contracts - Rehab and Renovations

[Nathan Frey]

I have a background in commercial construction & development, so when thinking about renovations or repairs, my mind often shifts to negotiating contracts with general contractors and vendors.  However, I know it's different in the residential world.

Is there a good rule of thumb as far as how formal or detailed to get with a contract when working with a handyman, general contractor, tradesman, etc.?  Of course I know the more tricky, large ($ and scope) and risky the project is the more important this gets, but really just looking for general guidance from those that have executed both large and small scale renovation or rehab jobs on single family up to perhaps quadplex properties.

Also, would you recommend working with an attorney upfront to create a "boilerplate" contract you can use with all contractors (assuming they all agree to the same terms)?  I know it's an upfront cost / investment doing this.  If there's a source for contracts that is recommended (by state), that would be very helpful as well.