Couple questions, all about bolts.

I have my engine back out to do a few things, it was only in long enough to start it and break it in and around the block a few times, now I'm taking off the oil and valve pans to reseal, not happy about this as I bought expensive reusable rubber gaskets. Anyway, Im probably just paranoid, this is my first engine build and I can't help thinking I want to recheck the torques on the head and mains. Should I, is there a proper procedure, should I just leave it alone???
Also I noticed when I installed the header bolts I forgot to put sealant on the end bolts, which bolts need sealant, are there any others that need it?