In the beginning, you will want to train your attention, a practice called "samatha" which will allow you to concentrate for a extended periods of time with single pointed attention. After being able to concentrate on a single point such as your breath or a mantra, you will be able to do cool stuff with insight meditation. It's also important to keep a daily sitting routine. I meditate for 30 minutes in the morning and 30 at night. Every month I try to do a 4 hour sit on a Sunday morning. Find a teacher or a sangha. Check out many different lineages. I tried Soto Zen, Rinzai Zen, and even Vedanta before ending at Tibetan buddhism.