I've been playing around with the Arduino for a while, and I love it. The problem that I am running into is how to build the infrastructure for a project. For example, how to connect components, how to run power, what to mount the components on, etc. An example might be best.
I have built the logic for a greenhouse sensor system (it's for veggie starts before you ask...). I've used the breadboard for the prototype, but I want to move to the actual system. This is where I am stuck. I need to have wires running to the sensors/etc for power and logic, but how do I put it together? I've tried using molex connections from hard drives, but I don't have a lot of them and I am not sure how to use them properly (my attempts are always loose). What connectors are good to use in what situation? What surface should I mount everything to? What is a good way to attach the long run wires? I don't want to use a PCB for the electronic components (they are fairly simple), so what else can I use?
I know there are a lot of questions. Answers for each would be awesome, as would a resource that covers this part of projects.