What will be some "Tips and Tricks" to do quite well in Codeforces(Div. 3).

Please let me know few things i should know, which could help me get a rank around 400-1000.

I sincerely want to be better in problem solving. I have been practicing CP for more than four years and don't see much improvement.

This is going to be my last contest so i want to at-least get into top 1k contestant. All my friends, juniors and junior's juniors have already retired and i don't have much motivation left.

Please don't down-vote. If you don't have any last minute tips, feel free to ignore this post !!