that all really depends on your tegu. Mine sits still and just lets me trim his nails with a pair of finger nail clippers. Other people its a two person job where the wrap up the tegu in a towl. One person holds the tegu like this and the other person finds a foot and trims the nails. really there is no easy way to trim a tegus nails.
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Leo Gex
1.0 Giants
0.1 Red strip/hypo
1.0 Patternless
0.2 Normals
Others:
1.0 Giant plated lizard
1.0 Blue Tegu
1.1 dogs
2:0 chinchillas