travel speed also needs to drop.
these days I set my travel speed to the same as my print speed. It cuts down on sudden acceleration, which creates little spikey bits of mpalsrtic and also adds vibration.
Print times are minimally effected.

Print speed you can go as high as 65. But in that case you need to print pla at around 200-215 depending on colour of plastic. ie: black prints at a lower temp than white. Most colours print quite happily at 210 - but you will need a print area cooling duct: http://www.thingiverse.com/thing:537918 .
The lowest I ever print pla at is 205 for black.

First layer speed should be 10-20% of actual print speed. For tpu/rubber filaments I can go as low as 5% on a 20mm/s print speed. Mind you that was for printing 3mm diameter tires :-)


Pla is a better final product if printed at higher temps.

Glue stick is about the best thing to print pla on. Cheap, easy to apply and clean off and you can build the layers up to compensate if you can't be arsed to calibrate often :-)
And you can apply it to any other surface.

And if you don't have a removeable print bed - it doesn't coat your printer in hair laquer ;-)