My thoughts on a good cash player for NL online:

1. Patience especially if you have a lot of tournament experience.

2. PT or PO for tracking and profiling online opponents along with a good hud. It can take awhile to build up a good db but its worth it.

3. Know your pot odds and more importantly implied odds. Implied odds requires some knowledge of your opponents to be successful.

4. Don't just play strong hands that can win but play strong hands that can win a players stack. Obviously any PP is playable to just about any reasonable raise for this reason depending on the stack that backs it up.

5. Money is made in sets (and full houses from improved sets) and str8s. Flushes while strong are harder to get paid off on so implied odds generally are not very high on them like they are with str8s and sets.

6. Big pots need big hands (not my quote). Any pair, TP, TPTK, and any overpair (debatable) are not a big hand so don't get married to them.

7. Bankroll Mgmt - Don't be afraid to lose your stack on hand just make sure when you do, you can reload and keep playing. Playing tight with a short stack isn't a bad way to start.