Secerbus Member

One that you can keep doing. You might like it now, but you also gotta stick to it for months. For me, anything with deadlifting, squats and bench press.

How about some bodyweight exercises as well? There's a subreddit dedicated to it! /r/bodyweightfitness

Just like you can't focus weight loss you can't focus weight gain unfortunately. It's all in your genes

Calorie counting works, it's the most accurate way we have currently to measure energy from food.

I went decaf and haven't noticed anything different

If they fit your macros yes, however you can try something like coke zero if you really want soda, zero for 0 calories.

Limit it. Calorie in, calorie out, always.