Had a college band director back in the day that stressed breaking every syncopated rhythm into straight 8th notes. In other words, look at every measure and feel (and count) straight 8th notes, perhaps with a metronome. For some reason tapping it with my finger over and over until I can be steady works for me. Then once you have a straight 8th pattern in your head, then do quarter notes on off beats, in other words tap the quarter notes on the "and" while keeping the constant eights in your head. Once you get the hang of that then start feeling the syncopation and stop trying to think and count (I'm always a goof trying to walk and chew gum anyway...) I find that the syncopation starts to come naturally and you get that groove feel without trying to do too much math in your head. Hope it helps.