I used to live very close and could go whenever, but now I am over an hour away and just go every month or two. These are the things I usually get.
It is true that TJs is generally a much better deal overall $ wise, but there are some good deals at WF, too. Resisting all the impulse buys in WF is difficult though!
TJs
maple syrup
raw nuts/seeds
nut butter
Kerrygold butter
various cheeses (kerrygold, etc)
vanilla
Tuscano Marinara sauce (TJs brand)
Niman Ranch bacon (no nitrates, etc)
Nature's Path Raisin Bran
plantain chips (but they always seem to be out when I am there

)
wine
lavender sachets (for dryer)
dark chocolate covered almonds
WF
365 brand organic coconut milk (that is their store brand)
365 brand nut butters
olive oil packed tuna
olive oil packed sardines
365 brand rosemary olive oil crackers
organic bulk spices, grains, dried beans (I usually get these at our local coop instead but they are worth checking out)
raw milk parmigiano reggiano and romano hunks ($ but delicious and last a long time)
not easy on the wallet, but yummy:
hand dipped whole milk ricotta

oven roasted tomatoes in olive oil (at the cheese/olive deli area)
fancy olives from the olive bar
their salad and hot foods bar kicks ass!

I'm sure there are other things - that is just what I can think of off the top of my head. When I start to run out of some of these, I plan a trip into the city to restock. Have fun!
ETA oh yeah, PP mentioned Hummus - TJs hummus is amazing! It tastes so good - love it! Also, I used to be big on their refrigerated pizza dough until I got good at making my own
