Suggestions

OK Shan, I will spend some serious time on meter because it's really, really important to make most of these forms work to maximum advantage.  First, I need to know how you currently work out your meter and where you think your trouble might be. 

If, for example, you want to write in iambic pentameter (that's five iambs or daDUMs... two syllables to an iamb, so ten syllables to a line) you might try speaking the line as you naturally would (always avoid unnatural stresses on a word, ie accenting the wrong syllable to make it fit) and then saying "daDUM daDUM daDUM daDUM daDUM" while you're reading it in your head.  If the words don't fit into the iambs, you have a problem.  Additionally, if you can't sing it, it's not metric (of course, you can still sing things that aren't metric so it doesn't work the other way around).  Iambs are the most natural meter for English but obviously not the only one... we might just focus on those for a minute though