How do you guys get lots of level on steam?

I would like to get be able to add more profile things but I don't know how to get a higher level lol. How do you guys manage to get a high steam level? I will buy cards if needed

Earning badges is one of the best ways to increase your steam level. Just go to https://steamcommunity.com/id/YOUR_USERNAME/badges/ and start going through the list and completing them. You'll have levelled up in no time.

I'm level 203 but i card botted and earnt cards, then traded those cards for sets and so forth. I also put a few $$$ into my steam and purchased sets and remaining cards.

An easy way is participating in big event steam sale activities. They usually have some special badges to earn and provide way to be able to craft it by doing something other than spending money.