You may find that it's all too easy to occupy your thoughts with the worries of yesterday or tomorrow. This is unfortunate for many reasons, not least of which is that it leads to a somewhat shallow consciousness.
When you're only thinking about events or details that cannot contribute to your growth, your scope of thinking has little opportunity to expand. However, many believe that reaching a higher consciousness is the result of years of meditation.
During meditation, the practitioner attempts to push aside the constant stream of thoughts going through their head. It may be difficult for beginners to achieve, so it's a good idea to aim to simply slow the thought process. Advanced meditators are able to achieve a completely calm mind.
It may take patience, as all good things do, but when you are able to find peace within your own head, you will find that it affects your entire being – mentally, physically and spiritually.
Author and philosopher Ilchi Lee has a number of books and instructional videos aimed at helping people get the most out of their meditation practice.