The "7 Suitable Conditions".
These 2 are very important: noble friendship and suitable conversation, they are the most important of the 7 Suitable Conditions. The rest are suitable weather, suitable food, suitable posture, suitable abode, (the place we live in), and suitable environment, (where that place is).
The first two are most important because if we have suitable friends and suitable conversation, they help the Hindrances to not arise, and help us to let them go if they've already arisen. They help us to develop beneficial qualities and help to maintain them. Thus they help develop the Four Great Efforts.
Suitable weather. If we live in a climate where we don't need a lot of material things, it aids the practice.
Suitable food. That is often food to help with any diseases we have. To maintain our health in a suitable way, to make our body strong, if we are so fortunate.
Suitable posture. By putting yourself in a suitable posture it helps the practice. If we're not in a suitable posture, it sometimes gives more chances for the Hindrances to arise, and if we are aware of our posture we usually have more Mindfulness, Awareness and Clear Comprehension.
Suitable abode: A clean, simple place to live that supports meditation. Suitable environment: One away from negative influences such as nightclubs, gambling, etc.