Far be it from us to offer tips to Warren Buffett, the most celebrated stock picker of his age, but here goes: First, because Buffett’s Berkshire Hathaway (BRK-A) has about $49 billion to spend, he’s said he’s looking at capital intensive companies, which offer plenty of chances to put that money to work. He might like a hot niche like oilfield services or pipelines: good candidates could be Baker Hughes (BHI) in drilling services or Williams Partners (WPZ) in oil and gas distribution, which would also expand the scope of his recently rebranded Berkshire Hathaway Energy unit.