How to define tablespaces in Oracle 10g and how put tables on tablespaces

Hello,
I'm having trouble to define the structure of tablespaces and how to distribute the tables/indexes/lobs on these tablespaces.
Do you know some rules on how to define this?
What I have until now:
1) Put table indexes in separate tablespace
2) Put lobs in separate tablespace and use storage clause when defining the lob column. Not sure how many tablespaces to use, I have tables with millions of lobs and tables with just one lob (with row containing the lob).
3) Please fill more rules here ...
Thank you, Alex.

Long story: I received database and schema creation scripts defined in Oracle 9i. I want to redesign the tablespaces number/storage and also to change the distribution of tables into tablespaces.
As an example I will show how tablespaces are created now. There is one tablespace for indexes BLUE_AUTO_INDX and one for each EXTENT MANAGEMENT of:
- 64K for BLOB , name BLUE_K064_BLOB
- 64K for tables , name K064_NTAB
- 128K for tables, name BLUE_K128_NTAB
- 512K for CLOB , name BLUE_K512_CLOB
- 4M for BLOB , name BLUE_M004_BLOB
- 64M for CLOB , name BLUE_M064_CLOB
- 8M for tables , name BLUE_M008_NTAB
- 1M for tables , name BLUE_M001_NTAB
- 256M for tables, name BLUE_M256_NTAB
Definition of each tablespace is like:
CREATE TABLESPACE BLUE_AUTO_INDX DATAFILE 'BLUE_AUTO_INDX01.DBF' SIZE 200M REUSE AUTOEXTEND ON NEXT 100M MAXSIZE UNLIMITED LOGGING ONLINE PERMANENT EXTENT MANAGEMENT LOCAL UNIFORM SIZE 64M SEGMENT SPACE MANAGEMENT AUTO;
CREATE TABLESPACE BLUE_K064_BLOB DATAFILE 'BLUE_K064_BLOB01.DBF' SIZE 20M REUSE AUTOEXTEND ON NEXT 10M MAXSIZE UNLIMITED LOGGING ONLINE PERMANENT EXTENT MANAGEMENT LOCAL UNIFORM SIZE 64K SEGMENT SPACE MANAGEMENT AUTO;
CREATE TABLESPACE BLUE_K064_NTAB DATAFILE 'BLUE_K064_NTAB01.DBF' SIZE 20M REUSE AUTOEXTEND ON NEXT 20M MAXSIZE UNLIMITED LOGGING ONLINE PERMANENT EXTENT MANAGEMENT LOCAL UNIFORM SIZE 64K SEGMENT SPACE MANAGEMENT AUTO;
CREATE TABLESPACE BLUE_K128_NTAB DATAFILE 'BLUE_K128_NTAB01.DBF' SIZE 20M REUSE AUTOEXTEND ON NEXT 10M MAXSIZE UNLIMITED LOGGING ONLINE PERMANENT EXTENT MANAGEMENT LOCAL UNIFORM SIZE 128K SEGMENT SPACE MANAGEMENT AUTO;
CREATE TABLESPACE BLUE_K512_CLOB DATAFILE 'BLUE_K512_CLOB01.DBF' SIZE 20M REUSE AUTOEXTEND ON NEXT 10M MAXSIZE UNLIMITED LOGGING ONLINE PERMANENT EXTENT MANAGEMENT LOCAL UNIFORM SIZE 512K SEGMENT SPACE MANAGEMENT AUTO;
CREATE TABLESPACE BLUE_M004_BLOB DATAFILE 'BLUE_M004_BLOB01.DBF' SIZE 20M REUSE AUTOEXTEND ON NEXT 10M MAXSIZE UNLIMITED LOGGING ONLINE PERMANENT EXTENT MANAGEMENT LOCAL UNIFORM SIZE 4M SEGMENT SPACE MANAGEMENT AUTO;
CREATE TABLESPACE BLUE_M064_CLOB DATAFILE 'BLUE_M064_CLOB01.DBF' SIZE 400M REUSE AUTOEXTEND ON NEXT 100M MAXSIZE UNLIMITED LOGGING ONLINE PERMANENT EXTENT MANAGEMENT LOCAL UNIFORM SIZE 64M SEGMENT SPACE MANAGEMENT AUTO;
CREATE TABLESPACE BLUE_M008_NTAB DATAFILE 'BLUE_M008_NTAB01.DBF' SIZE 200M REUSE AUTOEXTEND ON NEXT 100M MAXSIZE UNLIMITED LOGGING ONLINE PERMANENT EXTENT MANAGEMENT LOCAL UNIFORM SIZE 8M SEGMENT SPACE MANAGEMENT AUTO;
CREATE TABLESPACE BLUE_M001_NTAB DATAFILE 'BLUE_M001_NTAB01.DBF' SIZE 100M REUSE AUTOEXTEND ON NEXT 50M MAXSIZE UNLIMITED LOGGING ONLINE PERMANENT EXTENT MANAGEMENT LOCAL UNIFORM SIZE 1M SEGMENT SPACE MANAGEMENT AUTO;
CREATE TABLESPACE BLUE_M256_NTAB DATAFILE 'BLUE_M256_NTAB01.DBF' SIZE 512M REUSE AUTOEXTEND ON NEXT 256M MAXSIZE UNLIMITED LOGGING ONLINE PERMANENT EXTENT MANAGEMENT LOCAL UNIFORM SIZE 256M SEGMENT SPACE MANAGEMENT AUTO;
Does this structure of tablespaces ok? I mean if the logic of one tablespace for different EXTENT SIZEs looks ok?

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