I blanked both trips last week on my local patch.
First time out, I was out on a choppy surf beach hoping to pick up a decent bass. No bites even, but came back happy that I'd tried out some new techniques, learned some new things about the mark and my gear, and the session had gone to plan. A successful trip.
Second time out, I popped out because the rest of the lug in my fridge was on its last legs. Decent tide, coinciding with sunset, different mark. Worked my way through the worm, came home. No bites but this time I also knew that it wasn't really a successful trip. I was using the wrong bait in the wrong way in the wrong conditions really. Not targeting what was gonna be there (couple of strap congers caught just up from me), wrong rigs, it was basically a very slow method of chucking the now flagging worms into the sea. The sky was pretty and the fresh air was nice, but it wasn't really a proper trip. I could have just dumped the worms and sat on a rock for a few hours.
There are good blanks and bad blanks. If you blank and feel like you learned something and did stuff right, then it's a success. Might as well enjoy the blanks too.
If I take my kids, I will say "If the fish are there, we will catch them". When we blank, they just accept that the fish weren't there. I find this mentality helps me too!