Before meditating what I suggest is you practice
deep breathing for at least five minutes. This helps the body to completely relax enabling you to overcome the next hurdle which is the mind.
Then breathe naturally (without controlling it) and focus on the sensation of your breathing. Sometimes focusing on the sound of your breathing might help. Eventually with practice this will lead to a very quiet mind and a loss of awareness of your body.
I have only recently included deep breathing in my meditation sessions and it has made such a big difference compared to my meditations several months ago. Before it took me 20-30 minutes to completely relax now it only takes just a few minutes of deep breathing.
I have also found that having a specific goal for meditating helps.