Recently someone has told me that I play too fast. So I decided to record myself playing to a few songs and I found out that it was true. I was wondering, are there any exercises/practicing tips out there to help me keep in time with what I'm playing?

Also, if this is in the wrong forum, please (re)move it.
Play with a metronome/drum machine always.
"Physics is like sex. Sure, it may give some practical results, but that's not why we do it." - Richard Feynman