handle like eggs, keep fingers on the edges as much as possible, make sure its the right board before you break the seal on the package, turn off at the switched spur before any leccy work,
Don't forget to 'earth' yer sen on the copper pipework first before touching the PCB, also when fitting on to push fit plastic locating pins always use gentle pressure directly by the pin and not in the middle of the PCB. It is possible to crack or open a dry joint by rough flexing of the backing board it'self!
Yea pray and hope you got the diagnostic right and that the new board is not faulty. Now where did I put them paracetamol HEADACHES