If you make a mistake by doing or saying something that is damaging to the relationship, say that you're sorry. Many people struggle with these words, even when they know that what they did was wrong. It actually takes a strong person to apologize.
Be yourself:
Don't be phoney in your relationship, trying to be someone or something different as a way to please your mate. For a relationship to work, both people need to be themselves and react to things naturally.
Maintain your health:
Having a good relationship means having the energy to enjoy getting out and doing things together. To do that, it's important to eat right. When people are tired, they become short-tempered. For this reason, it is important to get the right amount of sleep. Good exercise keeps your body in shape for being adventurous together.
Compliment a lot:
Be generous with compliments. It's very common for people to notice something nice about another person and think about it internally, but never voice it. When in a relationship, compliments are like glue. They hold the couples attention and respect. Make sure your compliments are genuine.
Realistic expectations:
No matter how wonderful and flawless your mate seems, no one is perfect. Be careful about putting someone on a pedestal, especially in the early stages of your relationship. Ensure that the expectations you have for your mate and yourself are realistic.
There are going to be differences in opinion, and probably some dis-agreements. Also, do not assume that your mate knows how you feel or what you think about something. When discussing something important to you, ensure that you both understand the same thing.
The reality is that neither one of you is going to know exactly what the other one exactly needs. As long as you do not expect them to read your mind and accept that this is a part of getting to know one another and communicating, you will be fine.