There will times when you need to be stronger and there are times when you will need that extra consideration and kindness. No one wants to feel "stuck" or to doubt themselves or to be sick or depressed. The most important thing is to let your loved one know that you are there for them no matter what and to ask how and if you can help. Try looking at whatever situation and coming up with reasons WHY it happened and how you can both come out of the event stronger for it.
COMMUNICATE
I mentioned this above in "don't go to bed angry" and in "realize life is not always perfect" but it is important all the time. How was the month? What was GREAT? What are we looking forward to? How ARE you? What do we need to change? What are our goals?
Everything moves so fast nowadays and it is easy to misunderstand the person if you are half-listening or are not clearly forming and articulating your thoughts. If you need something from the other person don't make them guess or figure it out -- explain it and make sure you are on the same page. If need be, write it down. It is a simple way to avoid disagreements later on.
HUGS AND KISSES AND "I LOVE YOU"
It seems so simple but again when life is moving fast it is easy to sometimes forget the little things that mean so much. As humans we crave touch. Touch can relieve stress and tell the other person you love them without saying it. Think about the last time you hugged a good friend you hadn't seen in a while and how good that felt. There should be moments like that with your partner all the time.
A couple that gets out of the habit of hugs and touching can experience doubt in how the other person feels and it sometimes can make the next hug seem further out of reach. We all CRAVE touch from loved ones and if you are holding back because you think your partner might not want to be touched - don't. If you are really hesitant -- ask them for one -- I am sure they will open their arms wide.
Saying "I love you" is also important in good times and in bad. It is three words but it helps to let the person know that you do care and you do feel love for them -- no matter what.
HONESTY IS ALWAYS THE BEST POLICY
This one seems like a given but I know it is one that a lot of couples struggle with. There are people I have come across that hide credit cards, friendships and even some that hide addictions from one another. There is NEVER a good reason to hide things from your loved one. Firstly, doesn't lying seem like an awful lot of effort? I don't know about you but I have a hard time just keeping the facts of everything that is really going on straight in my head sometimes.
Lies usually come out in the end and there are always repercussions. Lies distance you from the one you are supposed to be sharing your life with and add to stress. If you have been dishonest with a loved one, the best policy is to tell them as soon as you can and own up to it and take responsibility before it comes back to bite you. If you are on the receiving end and your partner comes to you to open up and tell you about a lie the best policy is to let them know how you feel (hurt, etc) but to commend them on their honesty. It might take you a while to forgive them but if you think about the alternative way you might have found out -- it will make the forgiving easier.
DO NOT INSULT AND BE SURE TO SHOW GRATITUDE
I mentioned a gratitude list for your loved one above and it is good not only to make one when you are upset but at any time. Be sure to tell your partner what you appreciate about them. Send out positive messages on how you feel about them. Use your words carefully and say "thank you" even it they did something you felt they SHOULD be doing. I don't know many people that LOVE taking out the garbage or some of the other household tasks but somehow these are not things that get recognized often. If someone doesn't do something you expected and wanted them to do -- talk to them kindly and request it instead of making an off-handed negative comment. These little things contribute to how someone perceives the relationship. Treat your significant other like your best friend -- they are after all, aren't they?
These are what I believe to be the top tips for staying in love. I would like to hear some more ways that you have seen yourself or others stay in love for a long time. There is no better feeling in the world!