Re: I'm in the process of moving to Linux. What should I do?
1) First step, always, is to fully backup/image your working Windows PC.
2) Second step is to spend a short while going through each bit of software you use (not always what is installed!) and create a list of it, why you use it, and any special catches with that (e.g. you must have V1.1 because V2 broke XYZ...etc). Make sure you can find the installation media/files, and any licence keys, etc.
3) From step 2, consider how critical EXACT compatibility it, and how much you really need any compatibility. From this you can decide if there are Linux versions that are good/better substitutes. Generally for email & web you will find Thunderbird & Firefox are shipped with most distros and work just fine as long as you are not tied to Exchange and/or crappy IE-only Intranet services.
4) Decide if you want to dual-boot, or try creating a Windows VM from your current PC. Both have slight risk, and to be perfectly honest, if you can create a clean VM of windows, patch it, and install only the software you really need, it will be faster and more reliable. Pros & cons:
Dual-boot - gives you Windows native speed for games, etc, but you lose out on disk space and risk some dumb-ass Windows update breaking the grub boot-loader (some shitty old software, like certain Adobe things, would also break grub booting by putting DRM stuff just after the MBR and outside of the Windows file system assuming nobody ever needed that...).
VM allows simultaneous Linux (e.g. web/email safely) and Windows (specialist software) but is more memory-heavy and you lose out on fancy graphics speed.