You have to have patience in this field.
Basically, we try to buy value expressed in the differential between its price and what we think its worth.
Be sure that debt does not exceed 100% of the equity.
Be aware of the level of the stock market. Are yields low and PE ratios high?
I'm a passive investor. There are people who are very aggressive; they try to buy companies.
I'm not very good on timing. In fact, I've stayed away from it.