Does it fade over time at a table?
I used to have the shakes really bad when not playing frequently outside of home games, whenever I would go to a casino or card room. Part of it was the increased stakes and part of it was the unfamiliar environment - not knowing house rules and norms (like opening sizes). Observing over a few hands helped a great deal.
I started folding out anything but super premiums the first two orbits just to get settled in. And now that I have played more in these environments I don't get the shakes when first sitting down anymore.
(side funny story - the first time I tried this strategy, the very first hand I picked up AA, and it was a 3-bet to me on the button. "Well, shit" I think, so I made the shakiest hand 4 bet I've ever seen, and still got two callers. Flop comes A-K-rag. Checks to me, and I make a smaller sized C-bet but literally spill the chips on the table I was shaking so bad. Talk about a tell. Two quick folds from there.)