I Will Teach You To Be Rich
The One Page Financial Plan  as kokonotu points out is also a good one.
Further more, I'd recommend thinking about what you want to achieve with money. Ramit will tell you to enjoy life and save enough for later, I personally think the amount of money we (can) earn as software engineers can be used to buy a lot more 'free time' than most people think, allowing us to 'retire' (travel the world programming, building open source software, or whatever you like...) way earlier than most people. If you're interested in that kind of think you could have a look into Mr Money Mustache's blog  for instance. (Disclaimer: Some people might think he's a bit extreme, if you're that kind of person just try to pick up some of the good parts/habits and you'll be way ahead of the curve.)
I got a lot more mileage than I thought I would out of books like I Will Teach You To Be Rich by Ramit Sethi(http://www.amazon.com/Will-Teach-You-Be-Rich/dp/0761147489/r...). It rubs some people the wrong way, but it has some really good points about automating finances, and just handling companies via some social engineering.
Some of the things I think a bunch of people working day jobs are the insane benefits their companies offer. Make sure both your and your significant other are maximizing their 401k benefit(at least to kick in the employee matching and more if you can afford it).
The savings accounts should just keep compounding on each other. Possibly toss some other money into a Roth or into the stock market. Also have a rainy day/emergency fund for when the roof leaks and other unforeseen circumstances.
If you have a side project, that money should be coming out of your personal spending money. It should be thought of as your hobby and not impede on the family as a whole(this is for day jobbers).
Obviously finances get a bit rougher if there is no day job and it is just startups, it gets more difficult. One of the plans I had envisioned was to have an account setup and once it reached a certain percentage of drainage(aka burn rate for funded companies) that was agreed upon in the family, then there would be a meeting to discuss hanging it up and looking for a new day job to refill the fund to try again.
If you luck out and get funded and/or someone buys a project, that money should go first to replenish the project fund and then go into emergency, savings, and a little left over to celebrate(vacation, new back door, etc).
(As a disclaimer, I own a copy of said book, and I think it's good.)