Joining plasterboard - any tips?

[Mosaic]

I have to cut up some plasterboard lengths as the access to the room they are going in won't remotely allow the full 8x4 boards in. Does anyone have any foolproof tips for 'seamlessly' joinng the pieces so no visible bump occurs along the wall when installed and finished?

[NazNomad]

Yeah, use the tapered edges together and scrim & skim it before plastering.

[jomifl]

you are going to have to do as Naz says, ther is no way of avoiding it.

[Mosaic]

I understand how to do this on edges that are tapered, but inevitably cos I've gotta cut across the boards, some edges won't be tapered and its these I want to finish smoothly.

[tezestwing]

put it all up then with a very sharp Stanley and steel straight edge, cut the paper only then form a V groove at the board joint, then seal the joint with uni bond, try not to get to much seal or water on the face of the board, then when dry fill with normal filler and trowel off surplus as you go HTH Tez

[AlBags]

I cut the boards if reqd at 45 degrees to start with. Then nail lower board up. Remove point of top board edge and nail up .. Fill the gap as above.
Better/bigger joint area doesn't crack so easily.

[Mosaic]

Bingo Testie - it's obvious when you describe it - like all good solutions.
Thanks to everyone for helping out.