one thing I make sure I always do is have protein powder or an RTD shake with me at all times, if I cant make time to eat I will at least get a shake in

my car trunk has a tub of protein, a few monster milk RTD bottles and my backpack will always have a shaker cup with a few scoops in it ready to just add water or milk

also when bulking, I keep pop tarts in my bag

my "lazy guy meal prep" is getting the pre-cooked and diced "just chicken" and some broccoli from trader joes, add the instant brown rice from Costco and a little teriyaki sauce drizzled and pack those up ready to go

Prep on a sunday, presuming you work mon-fri, cook most of your protein on the sunday to do the 5 days, for example; 20 chicken fillets - store them in a sealed tupperware container in your fridge in work
Keeping it simple, eat fatty meals early, with green veg, or later carby like rice - takes a microwave no time to reheat if your bothered heating it

tricks i use in the am: whole egg whites into a protein shake, with broccoli cooked or raw, and nutrient dense/calorie dense cocnut oil - this can essentially become 2 meals in 1

later trick in day trick to get it in: grab 1 of those chicken fillets and eat 2 small bags of nutrient dense/calorie dense nuts, or no added sugar nut butter

Swap: cocnut oil for butter on brocoli/chicken - so little oily food is needed, in terms of volume that you can essentially double up

Bed tip: again raw egg whites (the the pasturised O'Egg type stuff if worried but i just go raw, into a concentrate whey - you could use whole egg to up the cholestorol/fat - also important to note that research now shows definitively that this type of meal before bed will increase gains versus not doing it

I might be wrong, but I think I remember an eating interview with Ronnie Coleman, where he said 'look, most of the time I just eat 3 meals per day.... they are just big feck off long meals'
If I remember correctly, there is recent research to suggest that the whole 'your body cant process more than 28/30g protein per sitting' is nonsense

Nutrient dense foods is where it is at in general but a good tool for you in particular to play with
Also, programming your body with fat in the AM is now proven to set the body up to run mostly on fat for energy during the day as the primary fuel source, leaving the carbs to go where they are needed
Also dont forget intra/post workout - you can smash a lovely 80g protein/120g vitargo without murdering your stomach for an extra high calorie 'meal'.

If you're looking to bulk,one of the easiest tricks is a slow feed protein mixed with you favorite cereal.I use muselix and phase 8 by muscle tech plus egg protein or natural peanut butter.Eat this in between real meals.