Need help in deciding type of partition for tables

Hi,
I have few tables which have millions of record. In some of the tables, we have data of previous years, which we dont use now. Can we create a partition table for such type of tables.
On other tables, How to decide if we have to use range/list/hash partitioning on our tables.
Do i need to recreate indexes for this tables after creating partition tables.
Please guide me.
Best Regards,

Partitioning decisions are based upon how you will access the data.
If you access by date then partition by date.
If you access by means of a list of values then use list.
If you there is no pattern and you just need to break the data up into smaller buckets use hash.
I see no reason why, based on what you have written, range partitioning by date would not be worthy of consideration.

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