New D800 Owner

After shooting Olympus for years, and being frustrated with their failure to refresh their DSLRs, I jumped ship y'day and ordered a D800 from Amazon - it should arrive tomorrow. I also bought an SB-910, a 50mm 1.8G, an 85mm 1.8G, a Tamron 24-70 2.8 VC, and a Sigma 70-200 2.8 VC. I'll now lurk on this forum for a while and may ask for help if I run across an insoluble issue. Any suggestions, warnings, hints, tips or tricks the forum has would be deeply appreciated. I'll delve into the forum postings a bit as well. Thanks in advance and please don't be too hard on a newb.
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Cheeky Monkey