Some tips.
1. Take your time. You will probably find out that you are missing something vital at some point in the build, leaving you with two bikes in bits. So don’t try for a ‘build on Saturday, ride on Sunday’ scenario, as you will end up running around trying to find a bike shop that is open.
2. Use the proper tools where required (see 3. below)
3. If you get stuck, stay calm – resist the urge to take the biggest hammer in the toolbox/mole-grips/blowtorch/dynamite to a bit you are struggling with. It will save you the walk of shame to the LBS with a part hanging off your bike that looks like it has been chewed by a robotic dog.
4. Enjoy it – it’s easy really.