I really reduced my meat consumption a few years ago, was having fish maybe twice a week. Meat just once or twice a year.
Over the last year however, I've started eating more meat as part of plan to try to raise ferritin which is always low.
I feel like I notice more energy the day after I've had red meat. I'd say I have it once a week now, more when I am eating out a lot as DP and I have had to travel quite a bit recently and ate out a lot then.
This weekend I had salmon on Saturday and steak on Sunday and I honestly feel like it's boosted my energy! They are very expensive though and we will have veggie meals now for the next few nights, but will probably eat out again as away later this week.
In general, trying to reduce consumption of meat for environmental reasons is a good thing I know, so I do feel a little guilty that now I'm adding more meat to my diet, it's like I'm going backwards 
How much meat do you eat regularly? Do you feel better including it in your diet?