Things You'll Need

You can do it without the following items, but they are highly recommended for the most rewarding (yes, really!) experience possible:
A few shoulders to cry on. It really does help to talk about it, preferably to more than just one person (if only to give your best friend some relief).

A Teddy Bear (for hugs and to talk to at 4am when everyone else is asleep.) Dogs and cats will do, too, although pets may not always give you quite that loving sympathetic gaze and undivided attention that teddy bears are so good at. (But avoid the stuffed animals/gifts your ex gave you)

Hot showers (As much as you may not even want to get out of bed, much less get in the shower - *sniffle* "who cares if I wash my hair now, anyway?" - you will feel better after a shower, or a nice long soak in the tub. Hot water relaxes tense muscles, soothes anxiety and refreshes puffy, tear-stained faces.

Paper and pens (a journal is perfect, paints and glue and other illustration tools, even better!)

Funny movies and absorbing novels can be a great temporary respite and laughter can really lighten your mood.

If you're one of the millions who try to fill that empty sad feeling through your mouth (which usually doesn't work because food isn't what you're missing), fill the fridge with celery sticks and other light snacks that you won't regret later if you eat too munch.

Food - don't forget to eat! Heartbreak can often rob you of your appetite, but be sure not to to punish yourself and remember to think about you as you are the most important person now. Being ill from malnutrition won't help you be strong enough to move on.

Your sense of humor and your knowledge that "this too shall pass".

Lots of tissues.

Self-love. even if you aren't feeling so hot about yourself right now, look in the mirror and remind yourself of all the good things about you, and the fact that breaking up does not mean there is something wrong with you. Remember that lots of great people have failed relationships; the fact that your relationship failed says nothing about you as a person. it doesnt mean there is something wrong with you, it means there was something not working in the relationship.

Friends and family are a great support system - they will do anything and everything to help you heal and be happy again. Go out to play with them, even if you don't feel like it - you won't regret it. If you have unsupportive people in your life, you need to seek support elsewhere.
The realization that great guys/girls DO exist, this is not the last person you will ever love, and hopefully you'll find the one for you that you'll go the distance with. If you found it once, you can find it again. Promise. :)