So, most of the replies haven't been very helpful to the OP - so I'll try and give him some tips =P
First tip, watch any videos of Anther. He's probably the most proficient Pikachu player right now. Watching his replays will be a good place to get a general sense of how a good pikachu plays out.
Second, browse these forums! There's a plethora of information here, and even more is coming. Just look at the sticky threads and check some of the new topics that are being posted. It's all great stuff!
Finally - JUST PRACTICE! As with any character, the most important thing is simply practice, and experience. No amount of advice or studying will ever be worth as much as simply playing other good opponents, and practicing your techniques. The more you play, the more natural things will feel, and the more fluid you'll become.
I hope this was helpful!
Meow.