In short, the best advice to writing a good scope of work for a client agreement is to be specific. The SOW will describe what the creator is obligated to do. If all you say is “Develop a Website” it will be very ambiguous about what that means. How many pages? What will they look like? Who will write the content? Will there be photos or videos? Etc.
In addition to the actual services, it is smart to include specific dates or time periods during which the work will be completed. And if you need anything from the client during that time period, be sure to place time limits on them too.
One good strategy is to break the scope of work into sections with lists. For example, when developing a website, you might use something like this:
The Contractor will create a website for the client as follows:
Depending on the type of work involved, it may be smart to list things that are not included. For example, if you are developing a website, you may want to state that hosting of the development site is included, but ongoing hosting after you launch the site are not included. And related, you may need to make it clear that you will not be doing ongoing maintenance or updates to the site unless the clients signs a new client agreement (or a new SOW) covering that additional work.
There’s so much more to learn! Here are a few related guides you should read: