I have a directory on each machine that are to be kept in sync, then I just put everything in a git repo. Go to work, pull, done. Go home, pull, done. Anything not in that directory is private to the machine, all my work is in the repo.
I just work in the Dropbox folder itself. I.e I do not drag and drop at the end of the day - the code and/or documents live permanently in the Dropbox folder. I truly wished I could selectively eliminate files (don't duplicate .pyc files, or whatever), but it works. A nice benefit is how dropbox keeps backups of everything. A couple of times a stupid moment at the keyboard led me to blowing away a file before checking it in. No problem, Dropbox had it versioned.
I keep work and personal projects separate.
Despite that, all my code is in git so it is synced wherever and whenever I need it, as long as I am disciplined about pushing to my central repo.
There is some data that I use on both home and work machines (vim config, bashrc, etc.) and that is in an "environment" git repository so it is easily syncable.
Shared bookmarks are most important to me so I use Pinboard.in and GetPocket on each computer. For documents I use MicroSoft OneCloud or whatever its called today. And lastly, my fav, is I have a SanDisc SD Plus Ultra II that lays very flat in my wallet yet opens to a USB. Love it.
I'm personally not a big fan of working from home at night. However, at times, I have to work from home due to personal reasons and hence the questions.
Thanks for sharing your current solutions.
I just slip it in to my bag and open it when I get home. I sometimes have a few issues with after-work beers interfering with the sync process, but generally it works OK.
I use unison from command line to sync files between pc's, backup server and mounted devices. Internally, if I remember me right, it's uses rsync.
I use BitTorrent Sync.
Leave your work at the office.
I leave my work laptop at work. After work I go to the pub, or a cafe, or to my apartment, and live life. Sometimes I work on personal projects, but _never_ on my work machine, and _never_ at work (the nature of invention assignment agreements makes this prudent).
Don't work for free.