Quite honestly, yes, i still check if there is a procedure for stuff that is not done that often. The main things one should know of course, those with the big black blocks around the title. But it is a good idea to repeatedly browse through the QRH to become familiar with the contents, be it the abnormal procedure lists, inflight performance (often faster than an EFB for a rough idea), current set of OEBs on your fleet and the additional info in ops data and supp info.