@Saapanael :
The board itself is actually nothing but a device that holds all the effects in the end. No more no less. You'll get very good quality boards from many different manufacturer companies - in the end I myself went with the Rockboard system since they have the Patchbay module option I mentioned ealier. Especially when you plan to build a larger pedal board this makes sense. As far as I know, Pedaltrain e.g. doesn't offer this, which is a big minus IMHO. Also I like the fact that there are very good flight cases available for all the different Rockboard board sizes as I think a poor quality case is very risky because a pedal board is not only sensitive by itself but also can be very expensive, depending on how you'll have yours in the end.
But first you should think about the final result: What will you have set up on your board in the end? You should really start with it all in your mind and in theory then creating it all on a sheet of paper first. After I was really sure what devices I would have set up and attached to my board I started my research in the internet to find out the following data for each of the devices: Device measures (width x depth) and power usage (most effects run 9 Volts, but some pedals might require even 18 Volts. You also should research on the current draw in mA of each of your devices - you'll need this information much later when it comes to empowering them in the end).
After cutting out paper matrixes of all your devices sized 1:1 you'll know what size your board should have. Then you can buy the board itself and all the effects one by one you plan to put on. Allow at least 2 cm space to each side of each effect for cable plugs etc., and just don't calculate all spaces too tight. You'll be glad if you have some spaces left when it comes to connecting your effects with all the patch cables. Mark my words.
Next step: Fix your devices to the board. This will take time, but one advice: Be profound about this. If they're not really fastened that'll cause trouble in the end. There is some special loop and hook tape available for that occasion. I can tell you later more on the topic of how to fasten them when it comes to the time doing so.
The placing of the effects on your board has nothing to do with the signal path in the end. You just place them under aspects such as saving space and having your pedals in comfortable use. So it's helpful to place such pedals to the bottom row you will use more often than others.
We'll take a closer look at the signal path in the next step:
There are patch cables available in almost any lenght. Try to figure out which cable lenghts you really need and don't use cables longer than nescessary, long cable runs might effect your sound in a negative way in the end. When you have 24 effects on your board like I do, it makes a significant difference to the sound if all your cables sum up to lets say 15 meters or to 30 meters. Always try to keep the cable connections as short as possible.
The following effects should always be used IN FRONT of the amp:
Compressors, Wahs, Overdrives, Distortions, Tremolos, Leslies, Vibratos etc., and Harmonizers or Octave shifters should also be placed in front of the amp. Wahs and Compressors should come early in chain, followed by Overdrives and EQs,
while all modulation effects (Chorus, Phaser, Flanger etc.) and timing effects (especially Delays and Reverbs) should be placed in the FX loop. Here your signal should first run through modulations, then after should pass the Delays, while any kinds of Reverbs should be placed at the very end.
Equalizers generally can be used as well infront of the amp as in the FX loop, depending on what you want to use an EQ for. I have one in front of the amp right after the Tube Screamers in my signal chain to boost some mids.
After that all is done you should think of a good quality power bank. Make sure to get a good one that won't cause issues in terms of buzzing or humming. You definitely will be unhappy if you'll have spent a lot of money on good quality effects and gear but in the end screw up your sound by poor quality cables or even a poor quality power supplement. When it comes to empower your devices, it's most important never to connect analogue effects together with digital effects combined to one and the same power output. Digital devices only to their own outs, analogue devices only to their own outs. Each output normally is given a value of maximum current draw written to it, so make sure never to overgo its maximum mA draw. I'll try to stay a bit below and make sure that way there's some unused space of current draw, so the fuse won't break. The power bank I use is Cioks Ciokolate, it's the most professional available. It has its price, but I am really happy with that one. I'll keep empowering 24 guitar effects with this one and there have never been any issues yet.
Well, this is a summary of the most important things that should give you somewhat a direction. There's much more to speak about in detail and you can ask me whenever you want. Any questions at this point?