How do you solve/deal with procrastination?

I do get things done. But sometimes I think that I could have started some things early, avoid rush. Also a sort-of negative perfectionism that does the opposite, where I end up delaying the start while thinking about the best time to start and how to avoid possible trouble etc.

How do you categorise and adjust accordingly about such stuff?
If you are someone who got out of or reduced such behaviour(or helped someone to do that), what were the things that you/they did? How did you/they start out and progress etc.

Thanks in advance