Few things that you need to do with your A600:
1. Get an IDE to Cf adapter with CF card, and use it as a HD
2. Check if you have 1MB Chip RAM upgrade found under the trap door, if you dont, get it.
3. Get a fast memory upgrade, either from kipper2k (4MB http://kipper2k.com/amigaforsale/
) or amigakit.
4. Get the PCMCIA to CF adapter so you can transfer ADFs from PC to Amiga.
5. Enjoy, there is more you can do, but that's for later !