I start by choosing the scale i want to use to make the beat. Then i use a chord progression or melody as my base for the rest of the beat. I will usually build around that with my sounds, making sure the sounds all fit together. To stay on beat i add a simple clap, the metronome throw me off sometimes when making a trap beat (depends on the tempo). Then build your percussion around the entire beat, adding details to the hi-hats, open hats, chants, kick, 808, etc.
Eq, add effects, and mix at the end. Making sure my effects are not too over powerful and still fits with the rest of the song.