Valve Cover Gasket Replacement

I have a slight oil leak that I'm 90% sure is a combo or the valve cover gasket, and a leaky oil cap gasket. It's such a minor leak, that the oil never hits the ground. The seapage basically just burns off on the exhaust manifold. I was just curious if anyone has done this job, if theres a HOW TO anywhere, and any info of what to avoid or watch out for in the process.
Thanks in advance.
96 850 Wagon