Here is my strategy:

1. Wait for a bull market
2. Buy only in the dip
3. Do DCA daily by splitting amount to invest into 5-6 pieces
4. Check price weekly (if no parabolic rise/fall)
5. Be ready to hold for 1-2 years
6. Investments must be boring and must not add stress
7. Don't expect to earn money, if you really want something you are not gonna get it
8. Wait for a good set-up, like in poker, play only strong hands and fold weak ones