Alcohol by far.

Also cocaine.

MDMA.

Sugar.

Develop software skills a tiny bit in a bunch of languages and areas without becoming an expert at anything or finishing projects.

I keep buying books that I don't have time to read. For example, I bought 6 books yesterday on Black Friday. I will probably read one or two. It just feel too good to buy things.

Drink and stay up too late.

Kids and wife go to bed. Have a drink catch up on a few things. Should just stop there. Next thing you know I’ve had 3-4 strong beers and it’s 2am.

Eating too much sugar and not exercising enough.

i keep building sites that dont make any money

Buying domain names I never use.

Undervalue self in salary discussions and negotiations.

I clip too many articles and URLs that I never read!

Probably eating too many sugary snacks, since I've got a bit of a sweet tooth.

I also tend to put things off a bit much. Got way too many projects I need to get around to finishing, tons of articles and videos I need to actually read/watch at some point, and a ton of things I generally want to do that I never get around to actually trying.

Engaging in open source communities with my real name. Never do that. Always use synonymes.

It's not that you cannot behave or might behave unprofessional. It's the others, and it will backfire one day.

Not building right routines to take advantage of the opportunities that life is presenting. Not having a good sleep routine is the chief one among these.

Pay $4 for coffee

Working for "the man".

Living

Smoking Staying up late

Overeating