A. A stitch in time saves nine: to say that it is better to spend a little time to deal with problems or act right now than wait. If you wait until late, things will get worse, and it will take much longer to deal with them.
B. Nothing venture, nothing gain.: meaning you need to take some risk (however little it might be) for any gain or thing you want to achieve
C.Dont count your chickens before they are catched: This means that you should wait until you know whether something has produced the results you desire, rather than acting beforehand.
D. Every dog has his day: every person has a chance for success.