UPDATE: I no longer have this tablet, but the info should still apply if you picked up one of these used and ran into the same problem I did.
Recently I purchased an Android tablet, the 7" Samsung Galaxy Tab 3 at my local Costco. I couldn't resist because it was such a good deal. Overall I like the tablet, and it's nice to have a little Android to play around with again. But over time I noticed one problem...
This thing can be sluggish...
But ultimately I kind of narrowed it down -- or at least, narrowed most of it down -- to the fact that it was just taking a long time to "boot." And that's why I wanted to shout this out to all the owners of this tablet out there that have the same problem I did.
My solution? Reduce the number of home screens, and especially the number of larger widgets that you have placed onto those screens.
Seriously, the way the tablet shipped was in such a state that it came pre-loaded with several home screens that had several of the very large widgets pinned onto them, such as the large weather widget, as well as large widgets for some of the portals into Samsung services, like their music hub (or whatever they call it). Seriously, when I took all that stuff off, reduced the number of home screens down to about three (with just icons of my most used apps, the Google search field, and maybe two or three small widgets), I noticed that getting the tablet into a working state from a cold boot didn't take as long anymore. And the tablet is more fun to use now.
Granted, this is an economy tablet, and regardless of how bare you make your home screen(s), the tablet as a whole is not going to perform on par with the more expensive tablets on the market in all situations. But at least in this case you can alleviate one major bottleneck that affects this particular device in this scenario.
Now go play some Flappy Bird.