Is your cellar damp? If so, you may have to correct that problem before installing your tools and lumber supplies. Insulate pipes to prevent condensation. Make sure your gutters outside keep rainwater running away from the house. Cracks in the cement floor or walls should be filled with hydraulic cement; a high water table may necessitate a sump pump to collect water at a low point and pump it out. Any or all of these circumstances may also require a dehumidifier. In any case, dampness is unacceptable where power tools are to be used because of the risk of electric shock.
Finally, properly preparing your wood surface is super important. It will make a huge difference when it comes times to stain, paint, or finish your wood. There are a lot of tips for wood surface preparation, but sanding the wood is one of the most important steps. And I find it really helpful to do the bulk of my sanding before I start ripping (cutting) and building with my wood since it’s still in whole pieces. You can check out my simple tips for how to sand wood in my how to stain wood tutorial, which is also good to reference if you need to learn how to stain too!
Once you’ve planned the basic layout of your workshop and have added all the tools and speciality appliances you need, take a last look at the overall design to make it aesthetically pleasing. Add overhead lighting for general illumination and task lighting over your work stations so you can see your project clearly. For maximum flexibility, you can mount clip-on work lights to nearby shelves and point them where you need them, knowing you’ll be able to move them about as required for different projects.
For all of my planning, I must admit there simply was no room in my shop for some tools. I struggled to find a place for my wide jointer and eventually decided against shoehorning it in, instead making a fixture for my router table that joints edges quite well. My scrollsaw, the bulk of my wood supply, and some storage cabinets didn’t make the cut either. These remain in a nearby room.
Let’s be clear about one thing: No workshop is perfect for everyone. If there were, I could simply give you a precise plan to follow with clear dimensions. Every person who comes to the hobby, avocation, or profession of woodworking has his own particular collection of tools and his own peculiar work style, skills, and desires for the kind of woodworking he wants to do that gives him a unique approach as to how he will lay out a shop: where the tools should go, where lumber and supplies are stored, and how much bench area he needs.