SaaS - Enterprise & SMB B2B

What's the best resource for drafting a contract between a SaaS company and its clients?

I will be incorporating a subscription-based website service as a single-member LLC. I will use LegalZoom or the DIY method via local government websites in Washington. The business will allows its customers (which are businesses) to log data, and retrieve at a later time. I want to protect myself and the business from lawsuits over data loss, in the event that something catastrophic happened to the service. It seems this would be a common concern for SaaS startups. Can someone recommend a resource for drafting the appropriate language, or is this something that is less accessible in template form and requires legal consultation?