Productized services are a consulting engagement with a fixed scope and a fixed price for a specific target market. It can be a great way to specialize and charge more in your business, and often are tied directly to business value.
Helpful articles by Patrick McKenzie
Notes from Paint By Numbers talk - a highly influential talk for me, what Patrick would do differently if he was starting now
How I went from $100-an-hour programming to $X0,000-a-week consulting - How Patrick made like $30,000 a week selling email
What I Would Do If I Ran Tarsnap - Patrick deconstructs a business that he loves but hates how it's run
The Jonathan Stark body of work
https://www.jonathanstark.com/ - his mailing list is golden
Hourly Billing is Nuts - his manifesto
https://www.jonathanstark.com/building-the-perfect-sales-page - his template for a sales page that fits for productized services well
The Jane Portman body of work
https://uibreakfast.com/ - her site, this is an excellent example of a productized services website
Your Productized Consulting Guide - I haven't read this but heard her promoting it. Looks solid.
The Kai Davis body of work
https://makemoneyonline.exposed/ - the best business podcast about how to run a consultancy, has 114 episodes of gold and is really funny. After listening to this I hired Kai as my business coach.
https://kaidavis.com/ - Kai's mailing list is golden
Kai also has a lot of ebooks that are relevant and quality
The Philip Morgan body of work
https://philipmorganconsulting.com/ - Philip's email course explains how to position yourself
https://www.badassyourbrand.com/ - Badass Your Brand is an amazing book about how to be remarkable. She now commands $15,000 for a 3 day brand makeover service.
Examples of productized services in the wild
https://itmustbee.com/ - Elise Fog makes websites, for beekeepers
https://megcumby.com/ - Meg Cumby gets testimonials/social proof from past clients for you so you don't have to feel awkward
https://worstofalldesign.com/how-it-works - Pia Silva from Badass Your Brand fame offers a two step process - "roadmapping", basically a planning session, and then a full brand overhaul for a fixed $15,000 for 3 days.
https://draft.nu/revise/weekly/ - Nick Disabato's paid mailing list about A/B testing
http://jarhq.com/blog/100-productized-services-examples/ - a list of around 100 real productized service businesses
Ideas for productized services
Security monitoring as a service
Your SaaS app uses a lot of third party libraries. But how often do you check to make sure you've installed the latest versions of everything when there's a security vulnerability found?
The reason Equifax got hacked is because they sat on a 10/10 critical security vulnerability in Apache Struts for 3 months and then someone noticed. If they had this service, I would have prevented the costliest security breach in history.
I'll monitor your package.json or Gemfile or requirements.txt file and send you an email whenever there's a security vulnerability that affects your system. Then I'll keep hounding you until you patch your site, escalating to calling the CEO at 3am.
Stripe integrations as a service
A Stripe integration is kinda hard to get production-stable. There is a lot of introductory material about how to do a basic setup and the documentation is great, but there aren't many resources that explain how to do everything from start to actual finish - a production system. I am currently integrating Stripe into a SaaS app for a client and it seems like there could be a productized service in here somewhere.
One of the simplest - offer a 1 hour strategy call for $X00
Most of the high powered consultants I know offer a one hour call for between $100 and $500. Use Calendly.com to arrange the calls and even accept the payments.
Useful tools for productized services
Calendly.com - let clients pick a date and time for a call from a selection of available times you specify. Also lets you charge for an appointment in simple cases.
Pipedrive.com - a CRM that is widely regarded by people in my consulting circles
Zoom.us - a very solid video conferencing system for doing client calls, webinars, and I think even making screencasts
Drip/Convert Kit/Mailchimp - email automation tools. Combine with Zapier to automate everything.
Know a resource that should be added?
Tell me about it at firstname.lastname@example.org. Also happy to answer any questions or give feedback about your productized service.