The Never-ending game of polishing your paper

Today I stated to revise (again) my paper on R&D spillovers but as always, there is a trade off between how radical one want the revision to be and the available and desirable time to invest in it. I believe I made the right choice by moderating myself and all the "other" things can be addressed in future work rather than struggling and stressing over right now. Anyways, I manage to migrate the whole paper in TEX format after some time and it looks fairly good. Another thing that struck me was how much we change and evolve in a matter of months: you get excited about a topic, write something, get some presentations out, are close to publishing and then move on to a different topic; the distance starts to increase between your current interests and the paper; you submit it somewhere; more months pass by and you are almost finishing the other paper; pending on the name/status of the journal you've submitted your 1st piece, other months pass by, you get the second paper out and start presenting it; in the meanwhile you get the referee report and it asks you for some things; you have to dive back into the first one, although you may not want to, etc; do the required things, get back into those issues and things, etc. pretty strange duality, so more papers and different you have, the harder you're making it for yourself. The second funny thing is word/expression perishability in a matter of months I discovered that I could have formulated some things a whole lot better than I initially did.