Whether it's for religious or personal reasons, if you want to dress more modestly, here's the guide to how to cover up.

Go through your closet. Do not jump to throw out clothes that seem immodest, because there are many possibilities and new ways to use them.
Decide what your standards of modesty are. Does modesty for you mean dressing in a way your relatives would approve of? Does it mean covering your shoulders and thighs? Does it mean avoiding clothes that cling to your skin? Is it covering your arms and legs? Figure out what makes you comfortable and feels right to you.

Try your clothes on in front of a large mirror. See how your clothing fits you and what impression it conveys. Bend over, sit down, wave your arms around. Make sure your clothes don't shift around too much.
When you go shopping, keep your eyes out for modest clothing. If what's in is crop-tops and that's not modest for you, look in other places, such as second-hand clothing stores and online stores. Also recognize that it might take longer to find clothing, but it's certainly possible.

Remember: just because you decide to dress more modestly doesn't mean you have to abandon all hope of dressing in a unique and cute manner. You're not doomed to life in a floor length jumper. Instead, look at this as a chance to get the style you've always wanted. Have fun with finding a classier more beautiful you! Shopping for cool modest clothing may seem tricky at first, but you get better and better as time goes by. Pretty soon all your friends will want to know where you get your clothes.
Layer your clothing! Have a tight long-sleeved shirt? Wear a loose sleeveless shirt over it as a vest. It looks really stylish when done correctly and keeps with the reverence of the female form.
Love your miniskirts? That's okay! They look adorable layered over longer skirts or cropped pants or even your favorite pair of jeans!
Buy long shirts. Let's face it: few people look good in clothes that reveal their stomachs and lower backs. Long shirts cover the waist and prevent the likelihood of an embarrassing situation when bending over.
Making the transition to a more modest lifestyle is always easier if you do it with a friend. Find a good shopping buddy who's just as interested in changing their wardrobe as you are. You can help each other when deciding what's appropriate, and you can help each other with finding and arranging awesome outfits.


Don't go too crazy with the creativity, unless looking different is your style.
Depending on your parent's views, miniskirts may or may not be ok. check with them before you wear anything they might be unsure about.
Men may actually like you for you, and not just for your beautiful body.
If modesty isn't who you are, you don't have to be conservative.
Truly, these are guidelines... It's all up to your parents, and they may disagree with the above. Check with them to clear up anything you are confused about.