You should think about your own death 3 times per day at the very least.
When sitting in meditation, say, "That's not my business!" with every thought that comes by.
The heart is the only book worth reading.
Meditation is like a single log of wood. Insight and investigation are one end of the log; calm and concentration are the other end. If you lift up the whole log, both sides come up at once. Which is concentration and which is insight? Just this mind.
We protect virtue so that virtue will protect us.
Wisdom is in yourself, just like a sweet ripe mango is already in a young green one.