NawNaw

Hey guys, first post on the forum even though I have been using for the past year or two. Got a vg33e r50 and I'm taking off quite a lot with plans to do rocker cover gaskets, spark plugs and leads, and also doing a egr/btc delete as mine is stuck open. while I'm doing all this, what else should I do, and look out for? Is there anything i should replace while its off? and also what things could break as it comes off eg gaskets, piping etc.