Nicely done. I bootstrapped a consulting business, and ended up learning many of the lessons in this guide one way or the other. (Usually the hard way.) I don't usually find much value in write-ups like this, but this one matched my experiences pretty closely.

I'd like to see two more additions: one for figuring out what size you want to be, and one for getting help. Figure out ahead of time if you want to grow to include subcontractors or, possibly, employees; it'll change how you handle your business growth.

Also, get help. A freelancer or consultant actually has to do a lot of different jobs: you have to be a salesperson, a marketing person, an office manager, a professional, etc. Probably you only wanted to be a professional. It's easy for the paperwork to start to get disorganized, it's easy to fall behind on invoicing, it's easy to completely ignore doing any marketing (which might include things like building a nice website for your business). So, get help with those things. Despite the additional cost, you'll be glad you did.