We all have those "OMG I CANNOT FREAKING DO THIS I WANT TO DIE!!!" moments, right? I know I do. Anyways, here are some ways to perfect your songs more quickly. So, here goes:

1. Practice every day!
Let's say you practice four days in a row then skip the fifth day. The next day, even if you try to make up for the fifth day, you end up getting only five days of practice that week. If makes no difference if you play twice as long on one day if you skipped a day!

2. Feel the beat!
This helps you keep time. Tap your foot or nod your head to the number of beats in the measure. If you are in 4/4 time you need to tap your foot four times every measure.

3. Rule of three!
Play each measure three times each (in a row). When you can do this without messing up move to the next one. When you master two measures combine them and play that three times each.

4. Start good habits early!
If you practice the wrong way for a few days, you get really bored with the song and extemely irritated that you cannot play it after working for so long.

Hope all this helped!