We have all had that feeling before, of wanting to be able to put our thoughts into words and truly explain to people how we felt. Unfortunately for most, being able to do just that is much easier said than done and generally never gets done. For those that are persistent with their efforts however, writing and specifically writing poetry can be one of the most relaxing and rewarding activities you can do. Doing it properly will generally prove to be rather difficult for some, and will come easier to others, but sometimes just trying is enough.
Their are many different types of poetry, though the most common would be haiku, allegory, rhyme, and iambic pentameter. Each of these different types will be written and ultimately read/sound differently from one another, but they all have a special place in the poets heart. For personal poetry rhyming may prove to be the best path considering that is usually easy to turn the poem into a rhyme which can help to make it stick and keep things interesting as you proceed.
For those that may be skeptical about expressing feelings with poems, you should know that many successful hip hop and other genre singers got their start with poetry. The actual lines became the lyrics, and when given a beat were able to be listened to by the masses. Regardless of this fact however, some people can simply not write or do not feel comfortable and that is why expressing yourself in a different manner may be best. Art, music, song and dance are many of the finer art forms that are available to those looking for self expression.
When its all said and done, poetry is defined as a piece of literature written by a poet to express emotions, with varying styles and types of metaphors, similes etc. So to be a good poet is is important to read about and understand what all of these definitions mean before diving in to the world of actually writing. Another technique that may be used is to search your way through a library or the internet and read some of the works of famous poets in different styles. Doing this will expose you to what is already out there, as well as give you an idea of how it should be written, but you must not forget not to copy others, as this is meant to be self expression.